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Heat pump unit won't run, possibly electrical?

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  • Earlns_1 Nov 01, 2008

    What sie breaker is needed for this unit?

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If there is no lights on the furnace/air handler, and no sounds from the equipment then it does seem to be an electrical problem.

First try to reset all applicable breakers and fuses. If this does not bring something back to life, you most definitely need a professional on site.

Posted on Jul 01, 2008

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Posted on Jan 02, 2017

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Why does my American Standard heat pump compressor and condenser fan run when I have the thermostat set to emergency heat?


It's possible the "brain" thinks it can still supply some heat. Other wise there is a wiring problem or thermostat switch problem. Installed recently? Never used emergency heat before? What is your emergency heat type, gas or electric? Are you sure they are working. If not the "brain" senses and uses the only source available: heat pump. Thermostat? probably Honeywell? If so call Mfg customer service. Warranty on thermostat or heat pump? If so call customer service. Call your installer.

Feb 28, 2015 | American Standard Heating & Cooling

Tip

How Heat Pumps Work


How on earth can you get hot air or hot water from very cold outside air? How does a heat pump make this heat out of cold air?
When certain gases change their state from a liquid to a gas or from a gas to a liquid the magic happens.

A heat pump can do some pretty amazing things, when it comes to making heat. To understand the way they work, you must first understand what happens when certain gases change from a liquid state to a gas and back to a liquid again. To simplify it a bit we need to look at a basic air conditioning system. The refrigerant in an air conditioning system is changing to a liquid in the outdoor condenser. The compressor compresses the gas forming a hot gas. As this gas cools under high pressure it changes into a liquid form.

Inside the indoor coil the liquid is pushed through a small hole or orifice. When it comes out the other side it rapidly changes it’s state to a gas as the pressure suddenly drops. The rapid pressure drop changes the refrigerant to a very cold gas. Air flowing over the cold gas inside the pipes makes the air cool and provides air conditioning.


Now for a heat pump the process is much the same, only coils are just switched by used a reversing valve in the outdoor condenser unit. Instead of the heat being purged to the outside from the condenser unit, the indoor unit then becomes the condenser coil. The outdoor coil becomes the cold coil and cools the outside. This is why if it is very cold outside the unit will have to run in air conditioning mode for a short time to defrost the outside cold coil. When this happens the system will usually have electric heat inside to run and keep the indoor air warm.

The reality is that a heat pump is really no more than an air conditioner running in reverse. Through the magic of using refrigerants, a heat pump can then run many times more efficiently than straight electric heat. A careful heat loss/gain should always be performed by a qualified service person before any sizing of a unit. Too large or too small of a heat pump system can make it inefficient and possibly cause it to be very uncomfortable. The longevity of the unit can also be affected by sizing and installation. Be patient and look carefully for the best contractor to install your system.

A properly designed and installed heat pump system can give you many years of comfort and efficiency. If you look for and find the contractor that can do the job right you will get many trouble free comfortable years from your heat pump unit.

on Dec 29, 2009 | Heating & Cooling

1 Answer

Heat pump runs on electric when outside temperature is higher than cutin


Check your thermostat and heat pump owner's manuals. Thermostat may be programmed to require electric heat at higher temps. Also could be bad outdoor temperature sensor tied to
Heat pump system controls (I had that problem) When was it installed? Warranty thermostat and or Heat pump? Call installer
Thermostat programming is a headache. No help from installer? call customer service heat pump and thermostat. Some possibility of bad installer wiring. There is also a heat pump "defrost" cycle. Usually the Electric coil will turn on to compensate for the Defrost cycle which is just the standard air conditioning mode therefore moves heat from inside to the outside coil to melt the frost. This cycle may be occurring too often. I had that problem. Fixed under warrantee.
Heat pumps are complex machines. The controls even more.
You need a tech, hopfully you are still under warranty.
Hope this helps.

Feb 27, 2015 | Payne 15 SEER R-410A Complete Split System...

2 Answers

My heating unit is coming on and just running not blowing heat at all. what could be wrong?


my first impression is that the filters are too dirty and they caused the high limit to trip. needs serviced.

Jan 31, 2015 | Carrier WEATHERMAKER 48TCEA 4.0 ton Gas...

1 Answer

I JUST BOUGHT THIS UNIT IT HAS THE OUTSIDE UNIT AND THE INSIDE UNIT AND I WAS TOLD THAT THE HEAT PACKS IN THE INSIDE HANDLER IS FOR EMERGENCY HEAT ONLY...IS THIS TRUE?


Yes, if you are talking about a heat pump. It you have an electric furnace inside, the electric elements are for emergency heat. Otherwise, unless you switch it manually at the thermostat, the heatpump (outdoor unit) will run all year around. If you want to use your inside heater (electric heater) just switch your thermostat to "emergency heat" and it will turn on the electrical elements instead of the outdoor unit. This way will make your elec. bill higher tho. The heat pump is much more efficient. Hope this helps you , have good day

Jul 21, 2011 | Goodman Heating & Cooling

1 Answer

My heat pump has a problem heating when it is very cold. should i cut the emerg. heat on?


The emergency heat setting on the heat pump thermostat is manually selected by the equipment owner. This is usually in response to a malfunction in the outdoor unit. Doing so locks out the outdoor unit. The indoor auxiliary heating system must provide the heat required. Setting the thermostat to the heat position allows the outdoor unit to operate. Due to the expense of electric resistance heating compared to the efficiency of the heat pump, repairs should be made as soon as possible.
MORE HERE

Dec 15, 2010 | Heating & Cooling

2 Answers

Carrier 38CKC042300. oUTSIDE UNIT FAN WAS TURNING REAL SLOW. ac UNIT IS OFF BUT FAN TO OUTSIDE UNIT IS STILL TURNING. sHOULD NOT BE TURNING AT ALL WITH AC UNIT OFF


The outside fan may run if the unit is in defrost mode this is normal for most heat pumps it is there way of trying to keep the outside unit from staying iced over so the next time the unit runs it will have air flow through the coil and the ice will not be there to prevent air flow.

Jan 12, 2010 | Carrier 38CKC042 Air Conditioner

1 Answer

My unit has been running all day. set on 75 degrees and still only 65 in the house


If this is a heat pump depending on the outside temp. it may not bring the temp. up. It is really not efficent to run a heat pump below freezing or near freezing.I suggest running the Auxillary electric heat if. Most heat pumps have auxilarry back up electric heat banks installed in them.

Dec 26, 2009 | Heating & Cooling

1 Answer

Till what outside temp is the 8Kw heating output


Are you referring a to an electric furnace providing the heat, the heat pump providing the heat, a heat pump providing heat usually with an auxillary/emergency electric heating unit, or an air conditioner with an electric furnace attached? If your system normally uses a heat pump for the heat normally, there is an eletric auxilliary heater. You'll probably need to turn it on at the thermostat manually when the outside temp gets below 40 degrees. If you have it nice system, it might do it automatically. If you're referring to the electric heater being rated 8 kw, it'll run using 8kw when you turn it on. It doesn't have the ability to change what heat rating it is. If you're refurring to the heat pump system being rated 8kw, you're probably mistaken. A heat pump might possibly consume 8kw to run the system but that can't be a measure of the system's capacity. Heat pump measurement units are rated in tons, but the system will always run at the same ton capacity whenever it's on, provided it doesn't need any maintenance. Some commercial air conditioning and heating systems have to ability to modify their power output based on the outside temperature, but I doubt you're dealing with that kind of thing.

Sep 17, 2009 | Heating & Cooling

1 Answer

Smell of burning rubber


alright so you have a heat pump with back up electric resistance heat. We need to determine if your odor occurs when the heat pump is operating, when the electric resistance heat is operating or both to isolate the possibilities since the issue is intermittent. Thermostat should have an emergency heat position, this will shut off the heat pump and operate the electric resistance heat only. If the smell/odor occurs then we have reduced the possible causes. let me know, happy hunting.

Jan 13, 2009 | Heating & Cooling

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