Heat pump defrost sensor location. Models: WCY024G1 WCY030G1 WCY036G1 WCY042G1 WCY048G1 WCY060G1. Jan 25, 2013 · The demand defrost control measures heat pump outdoor ambient temperature with a sen- sor located outside the outdoor coil. Initiates but relay (DR) drops out Low line voltage. Coil Sensor Location Fig. The coil sensor included with the DB7110U replaces the existing defrost ther-mostat or coil sensor installed on the unit. Michigan. A bad defrost thermostat, sensor, timer, a bad relay, a stuck reversing valve, a bad motor, an inefficient fan, a stuck fan, or just anything of the like could be harming your heat pump defrosting process. present at the heat pump/defrost control The heat pump/defrost control will attempt to start unit after the anti-short cycle time expires, when a high or low pressure control automatically resets, or when the heat pump/defrost control exits the lockout mode as the temperature rises above 5°F Indicates that heat pump control has an internal component failure. 1. 7 out of 5 stars 2,086 Oct 4, 2013 · AMI PARTS WR51X10055 Refrigerator Defrost Heater Kit,Temperature Sensor WR55X10025,High Limit Thermostat WR50X10068 Replacement for General Electric 4. When the board receives 24VAC on the "Y Feb 20, 2023 · Step 4: Test the Defrost Sensor. AC Refrigerant is pumped through the coils to heat them. Improper Installation. In colder areas of the country, your unit might require more frequent defrost cycles, thus the timed portion of defrost is adjustable to occur more often and visa versa in warmer parts of the country. Heat Pump Defrost Board See below to download a PDF of the Heat Pump Defrost Controls Manual. Feb 19, 2023 · You can place the defrost sensor in a glass of hot water to check if the sensor will open. #6 · Jan 29, 2020. Instruction said to place sensor on second tube from top on outdoor coil. AquaCal®can maintain anything from small above ground pools up to very large commercial facilities. Oct 5, 2022 · Movement Sensor. is there a recommended area to place this sensor? On a previous service call we found the Carrier defrost control board bad, causing the heat pump not to cycle through defrost. Nov 14, 2018 · coil. When the defrost sensor opens, the heat pump should return to its regular operation in heating mode. SKU: 323447. The conclusion demonstrated that the heat pump with the new defrost initiation criterion had obvious performance advantages under different environmental conditions. O’ Fallon MO | Printed in U. Posts. Thank for looking at this post. instagram. Place the sensor on the coil where the OEM sen-sor/thermostat was Apr 27, 2022 · Manually switch the wall thermostat to AC mode for a few minutes. The thing weird, during the defrost, the base of the condenser unit wasn't receiving any heat. More than one disconnect may be involved. It's a mini-duct system because we have hydronic heat. 99 Replacing the defrost control board in your American Standard Heritage 16 Heat Pump is a task that requires technical knowledge and should be done by a qualified HVAC technician. Jan 20, 2010 · So the guy came last Friday. Feb 13, 2011 · I have a nordyne heat pump that does not defrost properly. defrost cycle terminates when outdoor stat opens or max time delay elapsed, whichever comes first. We finally turned our ~3 yr old Goodman on for the first time this year last weekend. FLASH RA TE INDICA TIONS: 1 — Flash/Second = Normal operation. Amps = Outdoor unit amps (comp. 00. ASIN ‏ : ‎ B00FN5DF0E. 01°C may be an appropriate choice. On this video I show how to re Mar 6, 2019 · In this video, Tim Smith shows you how to diagnose a faulty defrost thermostat on a heat pump. Pro4000. Am I going nuts or was I wrong to expect to see control voltage at Y terminal at the air-handler and outside unit upon a call for heat? Advanced setup menu item 1 switched to heat pump as well. Oct 23, 2023 · Step 3: Shutting Off the Heat Pump. Instead of the use of a klixon, which is attached to the coil, your using an anolog temperature sensor to a cpc input. com Jul 5, 2023 · Something is wrong if your heat pump is freezing up. The coil sensor included with the DB7110U replaces the existing defrost thermostat or coil sensor installed on the unit. Change Zip. View and Download Lennox ML16XP1 Series unit information online. installer zipped tie this probe within the defrost board bay area. When the defrost sensor opens, you will read 0. then the board determines if the heat pump needs to defrost by the temp differences. We are here to help you to learn how to do HVAC service & things like Defrost temperature sensor defective or heat termination thermostat open. So he changed the coil sensor and still had the same issue. com: Tools & Home Improvement Dec 27, 2021 · It is vital for service technicians to have a solid understanding of how a heat pump works. Oct 23, 2010 · Then the timer must accumulate what ever time its set for. This reverses the refrigerant flow, sending hot refrigerant to the outdoor coils. Show all. 12,077. Some issues are easily resolved, and others require professional help. Mexico. PLEASE READ : Please Visit My Amazon Store Front for Awesome HVAC Tools at a Affordable Price Delivered Right to your Home , Every Tool in my HVAC Tool of th Hayward - Compressor for HeatPro HP21404T/HP21254T. 6 out of 5 stars 3 2 offers from $65. $45. Feb 7, 2021 · Placing it about mid way through the circuit or slightly after that point should give you a good representation of the coil temp and not trigger it too soon when it starts to get cold. T measurement. , Serial No. Country of Origin ‏ : ‎ USA. 5. Out of Stock. Details: Replacement Compressor for Hayward HeatPro HP21404T/HP21254T Pool and Spa Heat Pumps. #9. Wholesale Sensors Pentair 473665 Replacement Probe Thermistor Defrost Sensor for Pool & Spa Heat Pump 24 Month Warranty dummy Wholesale Sensors Pentair 470190 Replacement Water Pressure Switch Compatible with MiniMax & PowerMax Pool & Spa Heaters 12 Month Warranty Jan 30, 2015 · Coleman Heat Pump Defrost. This is a $400 - $500 repair or a $75 part. Specifi cations & illustrations subject to change without notice or incurring obligations. Replacing a defrost control board can cost between $200 to $650, influenced by factors like heat pump type, the brand, and repair complexity. Longer or more frequent defrost cycles indicate heat pump issues. Then, use a multimeter to test the resistance of the sensor. Will not initiate defrost manually. php?id=100013331528228Town & Country Air Jan 30, 2024 · 2. when it's running and that stat is closed, it cumulates run time and initiates a defrost every 30, 60 or 90 minutes. Dec 30, 2011 · Below is the information concerning the parts and the heat pump. To test the defrost sensor, you will need to locate it and disconnect it from the defrost board. An adjustable setting on the board allows adjustment of the time between defrost cycles to either 30, 60 or 90 minutes. 14 SEER Models. If the sensor is in direct sunlight or is otherwise warmer than the rest of the device, the defrost cycle could not last long enough. The ideal shaded location in the Northern Hemisphere is on the north side of the building. When the unit comes back on the … Defrost control board. : Inoperative compressor, loss of charge, open ambient sensor, shor ted coil sensor. Keypad is defective. We discovered the defrost cycles were way too long. Feb 4, 2021 · Checked location of outside temperature sensor to ensure it wasnt touching heat pump's metal. Dec 21, 2010 · See how to replace the defrost control board in a heat pump. In case that you need to know what zone of the country I live in, I live in Southern Maryland, Zip 20657 Old Board Part# 031-01098-001 New Replacement Board: York 331-01975-001 Demand Defrost Control Kit York Heat Pump Model# E1FB030S06A Oct 4, 2013 · VEXUNGA 5uF 370/440VAC 50/60Hz CBB65 CBB65A Oval Run Start Capacitor 5 MFD 370V/440V Air Conditioner Capacitors for AC Unit Fan Motor Start or Pool Pump or Air Condenser Straight Cool 4. It ran like a champ, was cooling the house well until Thursday. During this period the auxiliary heat strips are automatically activated to warm the indoor air. kW = Total system power Shaded area is AHRI Rating Conditions at 47°F outdoor ambient temperature SS-ASZ16 www. Dec 20, 2010 · Model no. Ship to Home. This heat pump ambient temperature sensor plugs into the defrost control board and Coil Sensor Location Fig. If you have any questions let us know. Your heat pump must work harder to melt the ice when there is frost. TCH048AKD1. From Goodman: In certain applications the defrost thermostat may not be installed in the optimal location for complete defrosting of the outdoor coil. Aug 1, 2023 · When a heat pump goes into defrost mode, it temporarily reverses the heat transfer process to warm the outdoor coil and melt frost. Defrost temperature sensor open. Also for: Ml16xp1-018, Ml16xp1-024, Ml16xp1-030, Ml16xp1-036, Ml16xp1-042, Ml16xp1-048, Ml16xp1-060. Sensors should not be placed in direct sunlight as temperature readings can be altered by as much as +30%. 4 out of 5 stars 1,480 2 offers from $14. Fan guard. Coleman B6HZ036 family -- 3 ton. Cycle 24 volt power to heat pump control. (suspected this as the other morning when the sun started reaching the heat pump area the outside temperature reading on my thermostat rose over 10 degrees in a matter of a minute or two with no correlation of the ambient temperature changing). Page 21 Low pressure is measured at the gauge port connection. $2,969. This is a BRAND NEW OEM Carrier/Bryant/Payne Heat Pump Defrost Sensor. Jan 9, 2022 · No, it shuts down for about 30 seconds before starting again and going into defrost. If the unit was originally Nov 17, 2014 · Now the question: the defrost board went out again and I replaced it with 47-21776-86. 43. Cycles typically last 5 to 15 minutes and recur every 30 to 90 minutes. S. Locations for the total 6 sensors are classified according to the distance from the air fan and heat exchanger. 17 Mb. Original sensor and 1st replacement was on top tube. . Dec 12, 2014 · heat pump ambient temperature sensor location. and opens at approximately 60 deg. 316830 | Manufacturer SKU: HPX11024169. There is no other sensor that will initiate defrost. The difference between the ambient and the colder coil tem- perature is the difference or delta-T measure- ment. 1 20. ML16XP1 Series heat pump pdf manual download. Feb 23, 2008 · Yeah with the low pressure switched bypassed the heat pump will run and produce heat, the only problem is that it is still not kicking into defrost so it just ices up if I let it run in low temps. FREE Shipping for Perks Members. Disconnect power supply before beginning installation to prevent electrical shock or SENSOR equipment damage. Manual defrost switch defective. 6 out of 5 stars 1,265 #1 Best Seller Oct 29, 2023 · INSTALLATION INSTRUCTIONS. The SEN01159 Trane Heat Pump Ambient Temperature Sensor is a brand new genuine Trane, American Standard heat pump defrost ambient temperature sensor that comes in a sealed Factory Specified Parts bag. E044245775. Jun 5, 2019 · Air fan is installed on the upper side of the outdoor unit, thus the air is sucked from the side and discharged through the ceiling. This ML17XP1 outdoor heat pump with all-aluminum coil is designed for use with HFC-410A refrigerant only. Goodman-Amana 10030912 - L55-25F Defrost Sensor, 10030912- 10030912 is an official OEM L55-25F Defrost Sensor for Goodman-Amana HVAC equipment. The chillers, as well as the heat and cool units, can be used to create Jan 29, 2020 · 20431 posts · Joined 2014. Section 3. How to get it. The indoor unit is Hi-Velocity brand fan coil unit. If you are unsure where that is then you may need to do a little trial and error. Manufacturer ‏ : ‎ OEM Replm for Trane. • Patented hydraulic design adds only 2 PSI at 45 gpm, increasing compatibility with two-speed & variable speed pumps. Oct 4, 2013 · Carrier HVAC Motor Contactor, 120V 30 Amp Coil 2 Pole Replacement Relays Compatible with C230B, Air Conditioner, Heat Pump, Refrigeration Systems 4. amana-hac. When the thermostat calls for cooling, the unit will operate normally for about 5 or 6 minutes (varies) and then the contactor coil for the compressor and condensing fan is Aug 19, 2015 · 13. Availability: This item is currently not available. +fan) Calculations are based on nominal CFM and 70 °F indoor dry bulb. Oct 4, 2013 · About this item This is a Brand New OEM Replacement Heat Pump Defrost Sensor Top Qualty OEM Replacement Part! 0130M00105 - Goodman OEM Replacement Heat Pump Defrost Sensor: Hvac Controls: Amazon. Compressor. A bad defrost sensor is one of the causes of a heat pump turning into a block of ice! Thanks for looking and good luck!Pleas Oct 4, 2013 · HK32EA001 **Original Connectors** HK32EA007 Defrost Control Board Genuine Certified for Carrier Bryant Payne 1173636 Heat Pumps CEPL130524-01 4. Sensor defrost o65 c32. I had a hole develop in a refrigerant line at the condensor unit outside after some wires lying against the line rubbed a hole from constant vibration and all the refrigerant leaked out preventing unit from operating. 25 Hayward - Defrost Sensor for HeatPro. The flow rate should be at between 40 and 80 gallons per minute (gpm) or 9-18m^3/hr. 2. The outdoor coil sensor must be used. The heat pump/defrost control will attempt to start unit after the anti-short cycle time expires, when a high or low pressure control automatically resets, or when the heat pump/defrost control exits the lockout mode as the temperature rises above 5°F. Without the coil sensor, the DB7110U cannot determine when to defrost. e. 6 out of 5 stars 1,192 #1 Best Seller Jul 4, 2013 · OEM Upgraded Rheem Heat Pump Defrost Control Circuit Board & Sensor 47-21517-14 - Replacement Household Furnace Control Circuit Boards Select delivery location. Nov 1, 2012 · Basic Honeywell tstat. Mar 14, 2017 · The Goodman GS13 Heat Pump uses a Time & Temperature Defrost Board. System fault and lockout LED (DS11 / DS14) alarm codes takes precedence over system status LED codes (cooling, heating stages or defrost/dehumidification). Oct 4, 2013 · 626488 - Nordyne OEM Replacement Heat Pump Defrost Sensor: Hvac Controls: Delivering to Lebanon 66952 Update location Industrial & Scientific Oct 4, 2013 · The HVAC Genius 45/5 uF 45+5 MFD 370V/440V Dual Run Start Round AC CBB65B Capacitor 45 5 uF 370/440 Volt VAC Air Conditioner Capacitor for AC Unit Fan Motor Start, Heat Pump, Condenser Straight Cool 4. Getting the HSPF is easy enough, but publicly available COP data can be hard to come by, except for Amana/Goodman who publish it on their web sites. Connections from your heat pump to your pool water line can be done either by a certified technician or by you. General. Upvote. When the refrigerant leaks due to broken coils, there may not be enough heat for the heat pump to work properly in defrost mode. Heater contactor or coil defective. Dec 22, 2018 · Jesse Claerbout and Bill Frisbie explain how to test heat pump defrost and go over how defrost works in Carrier and Trane systems. Is Discontinued By Manufacturer. The compressor is supposed to come on first then the outdoor fan after and when the coil reaches 75 degrees it is supposed to come out of defrost and go back into heat mode. Advanced setup menu item 1 switched to heat pump as well. Replace. More Details. The SEN01159 replaces part number: SEN01066. 99. 4 Home» AquaCal Heat Pump Manuals. Reply. Keep the leaves, branches, and snow away from the device. The model number is GSH130421AD. Can cause severe injury, death or property damage. Page 2: Control Location DB7110U UNIVERSAL HEAT PUMP DEFROST CONTROLLER WARNING Electrical Shock Hazard. SKU: 323443. , and the correct part number(s) when ordering parts from the nearest authorized dealer or service center. i have this rheem 4 ton heat pump with demand defrost, and an ambient temperature sensor probe that has about 4 ft long wire. The third self-help solution is to move the temperature sensor on the heat pump unit’s exterior. My Tempstar SmartComfort 2000 heat pump will not initiate the defrost cycle. The defrost control board is a crucial component of your heat pump's operation, responsible for managing the defrost cycle to prevent ice buildup on the outdoor unit. To test it, you can measure the ambient temperature, make the sensor is removed and acclimated, measure the ohms Mar 1, 2019 · Goodman has released Service Bulletin SR – 076 regarding the location of the defrost thermostat on select Amana, Goodman, and GMC heat pumps. 1 - Defrost sensor harness (101334-02) 1 - Defrost control sticker (401,205S) Application Replacement defrost control kit 15D57 (614943-02) includes defrost control 100135-07. Nov 6, 2023 · Here’s the step-by-step of the defrost cycle: The system senses ice build-up and kicks off the cycle. It performed just fine through the cooling season and also did fine during the early heating season, so long as the outdoor ambient temperatures present at the heat pump/defrost control. This reversal allows the outdoor unit to generate heat instead of cooling the air. Additionally, twisted refrigerant lines can cause leaks, affecting the efficiency of your heat pump. For additional assistance, please contact our customer service number at 1-800-269-2609, 24 hours a day, seven days a week or send us a message using the Section 16. For example, sensor 1 is located on the top and edge side, and sensor 6 is in the bottom and center side. Place the sensor on the coil where the OEM sen-sor/thermostat was Dec 29, 2016 · The A/C worked fine all summer. WARNING: Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central Jun 11, 2010 · So, if your unit's HSPF was 9. The faster response time of 5 seconds would allow the system to quickly respond to temperature changes. Jan 23, 2022 · High-Accuracy Heat Pump Temperature Sensor: For a high-performance heat pump system that requires precise temperature control, a platinum RTD sensor with an accuracy of ±0. The Part # HH18HA279A (also 3NT01L-D5302) rated at L65F-33. 4 ounces. 02-23-08, 12:27 PM. The idea behind defrost termination is to know the coil temperature. I have researched and have replaced the defrost board 3 times (2 aftermarket and 1 Carrier OEM) along with the temp sensor (Carrier OEM). Is the indoor fan motor running?Is the outdoor fan operating?I Oct 4, 2013 · Item model number ‏ : ‎ SEN00347. Your still sensing temperature. 3. This blog article by ACCA’s Matt Akins will take you through the essential operation of a defrost control board and some basic troubleshooting. For AHRI Certified system match-ups and expanded ratings, visit www. Item No. Jan 17, 2013 · The timer motor does a brief trial defrost every 30, 60, or 90 minutes. Switched to heat pump. 0). com. This unit must be installed with an approved indoor air handler or coil. If your winters are wet/moist, sometimes there may be too much ice on the coil to eliminate everything when the sensor hits 50F. The Easy way to access the defrost sensor on a Goodman brand heat pump. Hope this helps. Place the sensor on the coil where the OEM sen-sor/thermostat was In this video we talk about the problem Rheem is having with there defrost control boards and sensors. com/hvac_explorations#heatpump Jun 5, 2019 · Finally, the average performance of electric vehicle heat pumps adopting the new defrost initiation was compared with the traditional PTC auxiliary heating method. Obviously, that’s not a long-term solution. Dec 27, 2017 · Defrost sensor replacement on a Goodman/Amana heat pump. A (10/10) May 10, 2019 · Helo All! We have a Haier Heat Pump outdoor unit, model HR30C1VAR. However, if you notice a heavy coating of ice, contact your licensed professional HVAC dealer as soon as possible. That should cause the system to absorb heat from inside your home and send it outside to the frosted-over coil and begin the defrost process . Note that in the Southern Hemisphere the Dec 20, 2016 · Join the fun on the website! http://workingjoesroundtable. Hayward - Drier Filter for HeatPro. Refrigerant Leaks. I have paid for a tech to "diagnose" the problem but was given a $ estimate to replace the defrost board and sensor (which was done before the tech came out to check). Recharging your refrigerant and fixing the leak will help the defrost cycle to function as usual. The outdoor fan takes a break, and the system switches to air conditioning mode momentarily (yes, even in the cold). com/The Facebook profile https://www. (Figure 7. Defrost Control Defrost Control The demand defrost control measures heat pump out- door ambient temperature with a sensor located outside the outdoor coil. He mesured the pressures and got a low reading on the low side (50), while the high was good (300ish). 5 x 2. 8 x 5. Many times it goes into defrost for a few minutes then the demand in the house is met and the unit shuts off. If code does not clear, replace the heat pump control. 1 sensor monitors the coil temp, another the air temp. To begin the defrost cycle, the heat pump shuts off the outdoor fan and reverses the refrigerant flow. It is an easy task that requires rigid or flexible 2” PVC pipes (image 3). 2 — Flashes/Second = F ault A (Lo w ∆T) i. facebook. When this happens, the heat pump’s defrost control sensor automatically starts a defrost cycle. All seems to be well with operation, but I was wondering why the change in position. Serial No. Place the sensor on the coil where the OEM sen-sor/thermostat was Dec 23, 2021 · A heat pump’s indoor unit is located inside an exterior wall, ceiling, or floor of a central point in your house. Description. Image Source. 1°C and a resolution of 0. Item model number. 5/10), or 3. The outdoor coil of a heat pump is about 10 degrees cooler than the outdoor air at any time. 01-18-2013, 07:12 AM #7. A second sensor located on the outdoor coil is used to measure the coil temperature. By stopping the outdoor fan, the heat pump prevents cold air from being blown into the living space during the defrosting Call or text 888-757-4774. Find OEM Lennox 17W11 Defrost Thermostat Sensor, Heat Pump, L60-31F replacement part at Parts Town with fast same day shipping on all in-stock orders until 9pm ET. During normal defrosting, the outdoor fan stops, and cool air blows from the vents. We have manuals, guides and of course parts for common WCH3362GKA1 problems. Best Sellers Rank: #254,117 in Automotive ( See Top 100 in Automotive) #78 in Automotive Replacement Ambient Air Temperature Sensors. 75 inches. Dual, Round, 370 Volts, 50/5 Microfarads. Coil Sensor. com/profile. Mar 26, 2018 · The OSA sensor must be mounted in the shade and never above building windows, doors, vents or dampers. Heat pumps use refrigerant, or coolant, to transfer warm thermal energy from outdoor air into your home to provide heat. Post Likes. You’ll need to have the system properly diagnosed and repaired. The defrost board works in conjunction with a defrost sensor, which measures the temperature of the outdoor coil. Any techs thats having the same issues, please leave a Jun 5, 2011 · Goodman stuck in Defrost. 61* (9. This defrost control may be used in various heat pump units to replace any defrost control listed in table 1. Nov 11, 2019 · On a defrost thermostat, you can also easily jump it out to test the board since it is just open and closed. Product Dimensions. The indoor unit (called the air handler) is installed inside an exterior wall that is in direct contact with the outdoors. Dec 12, 2023 · 4. Improper positioning of the unit can result in restricted airflow and frozen coils. A thermistor changes resistance based on the temperature it is exposed to. And then it will go into defrost. Control Location 1. A defrost “sensor” is generally a thermistor. Download 20 pages, 1. A defrost thermostat mounted to the outdoor coil closes at approximately 30 deg. Condenser fan motor, 1/5HP 230V 1PH. 01-09-2022, 10:59 PM #17. It was installed last spring as an upgrade/replacement for a failed unit. Check the internal area. Find all the parts you need for your ICP Heat Pump WCH3362GKA1 at RepairClinic. On a Carrier heat pump, the Testing the defrost on a brand new 2022 2-Ton 14 Seer Goodman Heat PumpRecorded on 11/08/22My Instagram: https://www. Replacement Defrost Sensor for Hayward HeatPro Pool and Spa Heat Pump. I am working on a Coleman residential packaged heat pump system. LennoxPros. And what you need to sense is coil temperature. AquaCal®has been the leading swimming pool heat pump manufacturer since 1981, offering a full range of units to meet any heating need. The difference between the am-bient and the colder coil temperature is the difference or delta-. 7 out of 5 stars 2,939 Jan 1, 2024 · The defrost control board is vital for a heat pump’s efficiency and lifespan, managing the defrost cycle to prevent ice accumulation and ensure the heat pump operates effectively. 5 and the COP at 30 degrees was 3. Page 16. These boards do not have any lights unfortunately. Howdy Folks, I've look around your site for help with troubleshooting my Heat Pump with little luck to my issue. Apr 21, 2010 · Location. One critical component of a heat pump system is the defrost control board. The demand defrost control measures heat pump outdoor ambient temperature with a sensor located outside the outdoor coil. If the coil still has ice on it when it gets out of defrost mode, the termination temperature needs to be increased. 61, then you're defrost-adjusted COP would be: 3. +. Fill out the part request form and someone will get back to you shortly. You can also view PH12NA042000AAAA parts diagrams and manuals, watch related videos or review common problems that may help answer your questions to get started on fixing your Heat Pump model. Please specify Model No. # 6. Feb 19, 2016 · Thanks for taking the time to watch our videos. 47D01U-843. A heat pump’s outdoor unit is located near the ground outside of your property. Trane. L on your meter, letting you know the defrost sensor is open. The only heat pump that allows you to maximize the potential savings of a variable speed pump is an AquaCal ®, which utilizes our patented ThermoLink ® Heat Exchanger technology with its unique flow characteristics. If your heat pump was not installed correctly, it can lead to problems in the defrost cycle. Higher flow will improve heat pump performance. Country of Origin. Date First Available ‏ : ‎ October 4, 2013. manual. On demand defrost. there's a thermostat clipped to the coil that closes when it's freezing or below. Aug 14, 2013 · The sensor is: Aquacal Heat Pump Water Temperature Sensor ECS6105 10K 0HM To remove the doubt I inverted the two probes on the electronic board because I found that the Water sensor is the same as the Defrost sensor The pump has started so it confirms that it is the water probe that is failing. tm sj cb wp ok nm tq jc tt lt