Try setting the temperature 2 to 4 degrees above room temperature. When to Call an Expert for Heat Pump Not Working. Your heat pump may also have old or worn-out wiring that needs to be repaired or tightened by a Trane Comfort Specialist™. (Dec 15, 2014) carl said:air handler won't shut off after heat pump shuts off. Emergency heat on, Aux heat off, fan working. 4 years ago. Breaker is ok. Thermostat set at heat, but small print comes up that says aux heat. A heat pump has two stages of heat. For all-electric systems, your emergency heat system should keep you warm until your heat pump can be fixed. Still, Tom, if you're not getting warm air out of the supply registers when the aux heat or backup heat is "on" then I suspect it's not really on. Re-posting:I had a new furnace and Guardian heat pump installed over the summer. When to Call an Expert for Heat Pump Not Working. If the airflow to your unit is blocked by snow, ice, leaves or another type of debris, … Let’s face it. WHY IS THERE ICE BUILD-UP THE OUTDOOR COIL OF MY HEAT PUMP? If both primary heat sources fail for some reason, that’s when you turn to the emergency heat setting. It just doesn't make sense to me that outside temp would effect emergency heat from the thermostat. When temperatures outside become too low for the heat pump to efficiently extract heat from outdoor air, a temperature sensor in the outdoor unit turns on the backup heat system. Whether you have a gas or oil furnace or a heat pump, filters need to be routinely cleaned or replaced. **Note that if your Emergency Heat light is on but your thermostat is NOT set to Emergency Heat, this is an indicator there’s a problem with your heat pump and you should call for advice and service. It could be a bad fuse or you might have flipped a breaker. The temperature at which backup heat should come on varies by where you live. Fan Auto function not working with emergency heat. (Feb 17, 2015) Anon said:Knocked the ice off the top of the electric heat pump's outside unit and now it won't run. Why does this happen? when temp gets to 10 degrees everything normal.Three service companies checked out this problem and said no problem. Emergency heat not working. (501) 764-9077 . Why isn't the heat pump engaging? would be common.If debugging the thermostats and temperature sensor do not lead to a fix, then the problem may be with the backup heater itself. Heat pumps can be complicated. When the weather is really cold (<35 degrees), the thermostat says "aux heat source" (or something like that) when the heat pump can't support the heating needs in the cold weather, as it's trying to use the aux heat source (gas), but the furnace does not kick on with gas heat. When the temperature in the house drops approximately 2 degrees below the room temperature, supplemental heat comes on to assist the heat pump (usually in the form of electric resistance heaters). Thermostat is working correctly, wondering what component in the compressor unit is controlling the activation of the auxiliary heat. Some heat pump systems include a feature called Emergency Heat that can be manually turned on if the primary heating system isn’t working or keeping your home warm enough. If you are in a cold climate and your heat pump unit is not producing heat it may be that your backup heat (perhaps electric) is not working. If you follow all the steps below and your heat is still not working, then you will probably need to hire an HVAC contractor or furnace repair technician near you to come out and repair your heating system.. "Only gets heat when in cooling mode.". On 2020-01-21 13:08:11.594006 - by (mod) -. OR the fan switch is set to ON, or the thermostat is never satisfied. There may be a control or wiring problem if the heaters themselves are intact. I'd check first for a failed outdoor temperature sensor. When the emergency heat is on now, it makes the house smell like its on fire, it is much louder than it used to be, and it doesn't put out heat. Brenda: We have a heat pump with our AC unit. (Dec 26, 2014) Anonymous said:I have an AMANA package unit that is just out of warranty (of course) and the AUX light comes on (and stays on) even when I lower the heat setting. It does not burn fuel to produce heat nor does the electricity it consumes go through an element. This is an easy work for any homeowner - make sure you maintain your heat pump’s outdoor coil clean at all times, especially during the coldest months. 0 0. hausmann. (Dec 22, 2015) Pete said:On my GE wall mounted heat/ac unit the fan blows but I get no heat or AC. Heat pumps only work efficiently if the outside temperature is 40 degrees or above. It just blows cold air. Emergency heat provided by a backup furnace differs from supplemental heat. This makes the heat work until the next schedule … What am I missing? Between the engine heat and the water pump, all the air should be forced from the system. Why is my thermostat saying the Emergency Heat is on rather than the auxiliary heat and what do I do to correct the problem? Try replacing the fuse or flipping the circuit breaker to the closed position. If your system is not heating effectively or if it is running constantly, check the outdoor unit for excessive debris such as leaves or snow blockages. Your heat pump is a very efficient means of heating your home. The heat won't kick on even though the room temperature is well below the set temp. Therefore, if it’s below 40 outside and the auxiliary heat isn’t working, then your heat pump will just blow lukewarm or cool air. You will never want it on emergency heat unless there's a problem with the outdoor unit or if it's below ~35 degrees outside. (Jan 7, 2015) tom Geiger said:Occasionally when heat pump is operating, thermostat goes into "aux" mode and then blows cold air, presently 32 degrees outside temp. WHY IS THE FAN ON MY HEAT PUMP NOT RUNNING? For heat pumps that require a restart at low temperatures, you will need to go through the owner's manual. Kim take a look at the diagnostics at LOST COOLING CAPACITY in the ARTICLE INDEX given at Continue Reading . warmth pumps use slightly distinctive concept than popular significant heating instruments. LindaI can't say if your particular backup heat will work or not, since sometimes a backup system that has not been tested in some time may itself be defective or inoperative. An Illuminated Emergency Heat Indicator Could Signal a Problem with Your Heat Pump: If the red indicator light is on but you did not activate emergency heat, there could be a problem with your heat pump. Diagnostic details provided by a thoughtful reader, Neal Renn. We have cut it off, left it off for an hour or so, turn it back on and all that comes out is cold air. In cooling mode, ALL heat pumps are very efficient, and work from northern Canada all the way south to Central America. Is your backup heat electric? Do the following: 1 Be sure the thermostat is set to the proper setting (“Heat” if you’re calling for heat) and the temperature you want the room to be. Have e-heat for when power is out, but that's not working either. A heat pump works like a heater in the winter and an air conditioner in the summer. Some of the critical controls that have to work in order for the heat pump to heat at all in cool weather, or to switch to backup heat mode include: The indoor thermostat - see THERMOSTATS, the outdoor temperature sensor Having Emergency Heat on can and will be more expensive to run. If your heat is not working, the first thing to do is figure out why. What's the second fuel? Heat Pump Not Heating. Check first that the MAN ON switch is not set on your thermostat or in the air handler - those can tell the fan to run continuously. Emergency Heat is Just What is Sounds Like: Under normal circumstances, your main heat pump should have no trouble keeping your home warm and comfortable in even the coldest weather. WHY IS THE FAN ON MY HEAT PUMP NOT RUNNING? Here are some of the most common issues affecting central heating systems. There is also an auxillary heat that is supposed to come on when temperatures get very frigid. For more extensive issues, or emergency heat pump repairs, do not hesitate to contact a professional HVAC dealer. Otherwise, just keep your thermostat set on “heat.” There is no temperature to switch it over to emergency heat, even if your heat pump is running constantly due to cold weather. With models that have a system selector switch, you will need to switch to emergency heat and check after six hours. 4 years ago. Opps! Brenda: We have a heat pump with our AC unit. That is, during the cooling season, the heat pump insists on providing warm air rather than cool air to the building. Heat Pump is set to Aux heat, with AUTO for fan. If interior of a definite quantity of time it won't be able to accomplish the … Worse yet, the primary heat pump may stop working altogether. You will need to examine no-heat diagnosis first of the controls and fuel source and then of the boiler fuel type itself, oil, or gas. So it relies on an auxiliary (AUX) heat coil (like the ones you see in a toaster) or a furnace to heat your home. The family woke up to an 85 degree house even though the weather remained in cooling season. That is, all of the same controls and components are involved. If you are in an area where the outdoor temperatures never fall so low that your particular heat pump system will be unable to heat the home comfortably then yes you need backup heat. What is... My heat pump outside unit is out and I switched over to emergency heat on my thermostat. Emergency Heat Not Working. Of course, any central residential HVAC system is supposed to provide cool air when it’s warm outside and heat when the outside temperature drops. While two or three air source heat pumps working together is acceptable, bolting four or more under-powered and inefficient machines together is costly, irresponsible and most infuriatingly, still going on today. Came on for one cycle this morning, now nothing. For more on this issue, see: Thermostat red light flashing or stays on. Can you advise the problem? But for those still wondering at what temperature a heat pump quits working: The optimal heat pump temperature range is above 25-30 degrees Fahrenheit. Well take it from me. or even loss of air flow entirely can be due to a variety of problems with one or more components of an air conditioning or heat pump system, after reviewing the lost backup heat diagnosis procedures described in this article, be sure to also review the diagnostic procedures at each of the individual air conditioning diagnosis and repair major topics listed just below. Mike I'm surprised the service companies found no problem since you indicate that the electric heat doesn't work when it's quite cold. I do NOT have it set to emergency heat, but the emergency heat light is ON. Small things can go wrong and cause the entire unit to shut down. The Aux light is OFF. The HP 2 STG 288ANA048 is the Heat Pump. For gas or oil furnace second stage systems, you should be fine for longer periods of time. Source(s): https://owly.im/a8sio. 0 0. hausmann. must trip breaker & reset breaker.only dose this when out side air is above 40 degrees. As above, you will need to examine no-heat diagnosis first of the controls and fuel source and then of the furnace fuel type itself, oil, or gas (propane or natural gas) or electric. Have dual heat unit. Electric Backup Heat Not Working: The requirement for backup heat for a heat pump system depends on where you live and what cold weather temperatures you can anticipate. BACKUP HEAT for HEAT PUMPS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. Nothing happens. The occupants found that the heat pump system was running in heat mode. This is normal heating mode for the heat pump and backup heat is not called-for.In heating mode the heat pump warms the indoor coil so that it will warm air blown across it, transferring heat from outside to inside. Either the blower isn't working, in which case you may get warm air but not much of it, or it is blowing air but it may not be very hot. Either way, we have some … You won’t damage the heat pump by running it, but it’s not likely to do much good. Your comfort and your energy bills will thank you when you do! Perhaps you mean it's a heat pump, normally operated by electricity, with backup heat provided by a propane fueled gas furnace / heater. Certainly heat pumps include an outside air temperature that controls the unit's switch to backup heat, right? A heat pump’s emergency setting should only be used when your heat pump stops working properly. [ 29 Answers ] I do have heat. The unit is not 'iced up'. This switch named “em. Why won't the heat pump switch over to aux heat in really cold weather (<35 degrees)? Wait for a few minutes. It has nothing to do with getting extra heating capacity or being a special setting for a cold day. I have a Carrier heat pump and my emergency heat is not working. Heat Pump is set to Aux heat, with AUTO for fan. As with furnaces, a heat pump not working can often turn out to be an easy fix if you know what to check for. Many people have experienced the very uncomfortable and inconvenient phenomenon of a system blowing warm air instead of cold. The temp outside is now 11 degrees and no heat at all will come out. Continue reading at HEAT PUMPS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. What do we do now? Why is my car heater not working? home inspectors of common cooling system defects. When temp goes up to 10 degrees everything works fine.When 0 degrees and things don't work turn thermostat to emergency heat outside unit shuts down and indoor blower runs but no electric heat. NO HEAT – The space temperature drops more than 3 degrees below the thermostat's heating setpoint.. (fyi, this is all in "heat" mode)when i switch the thermostat to em heat (emergency heat), the furnace turns on with gas heat and will heat the house to the necessary temp. what is the problem is this due to bypass the compressor kit , or its motor is short ? The temp outside is now 11 degrees and no heat at all will come out. control board, a contactor, a start capacitor and the outdoor thermostat which is used to determine when backup heat is needed. Any suggestions? Not all thermostats are compatible with heat pumps, so you need to buy a thermostat that was made for use with heat pumps. 24/7 Emergency Service. We discuss fan limit switches in more detail. One example is if the defrost feature malfunctions and the heat pump becomes covered in a … If that's the case and if you remove the propane then you have no backup heat. We don't know enough about your system to diagnose it's failiure to cool. 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