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Heat pump fan only running air handler fan only running was working fine quit last nite now no heat but both faans running

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Compressor must not be running. Possible capacitor, possible low pressure. Check it in cooling mode and listen for sound change out side to see if compressor runs.

Posted on Dec 11, 2016

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My air handler fan does not come on, the outside unit turns on fine. Is their a way to reset the fan?


Check for fan operation by turning the fan control at the thermostat to "on". If the fan blows, it works. If not, check a circuit breaker or fuse.

If the fan blows when forcing it on with the thermostat but not in automatic, check the fan control circuit in the air handler. Danger: high voltage, beware! There should be a system wiring diagram inside the air handler somewhere.

Mar 30, 2014 | Rheem 4 Ton Air Handler - RHLLHM4821JA

1 Answer

HE heat pump won't talk with old air handler?


The fact is, the air handler supplies the voltage, blower, and electric heat. In order for the heat pump to work correctly, the wiring from the thermostat and heat pump need to be hooked up right to the air handler. The thermostat is what tells which component to come on. If the fan stops, but the condenser keeps going, you either have a faulty fan relay on the air handler, faulty thermostat or wiring, faulty wiring at the heat pump, or the contacts on the new unit are sticking, which is highly doubtful considering it is working now. I hope I have helped you understand this a little more. Good luck and don't let them push you around, get someone that knows what they are looking at.

Jul 18, 2012 | Goodman Heating & Cooling

1 Answer

What does aux mean on a honeywell Thermostat? the heat doesn't seem to be working but warm air is comming from the vents and the heat pump fan is spinning just not enough to match the temp. it's set too....


The aux switch is for electric heat banks installed in the air handler. Depending on the outside temp. it may not be efficient to run in heat pump mode but in aux. or emergency would run the electric heat in the air handler.

Dec 11, 2009 | Goodman Heating & Cooling

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FAN STAYS ON LONG (HOURS) AFTER COOLING TEMP IS ACHIEVED


There is a built in delay on all HVAC systems to evacuate conditioned air (hot or cold) from the ducts -- it's just more efficient that way... but if it's staying on for more that 4-5 minutes at most then there may be a problem with the fan relay... or possibly a limit switch.

Sep 02, 2009 | Heating & Cooling

1 Answer

Trane air handler cycling rapidly


Depending on the age of your Trane unit. The fan relay has a time delay. This is a solid state board on the relay. Most of the time they stick on or off. Check for loose wires. But start with relay.

Jun 03, 2009 | Heating & Cooling

1 Answer

Air handler fan not working


Check the fan relay switch in the air handler.
Check the fan motor capacitor.
Check the fan blower wheel for binding.

May 25, 2009 | Heating & Cooling

2 Answers

My air handler comes on ,not the outside unit when my thermostat is in the off position even if i turn the thermostat down to 50 and have it turned off the air handler comes on for about 5 to 10 minutes...


If you have a standard thermostat the fan switch is for the air handler only. It completely over rides the thermostat for most settings. Now lets see this is what I'd expect:
fan switch on Indoor fan runs all time
Fan switch auto Indoor fan only runs when thermostat is set to cool or heat and the thermostat is turned up above room temp for heat or below room temp for cooling. In both of these modes the furnace blower comes on and stays on til the room temperature is satisfied. The outdoor unit only comes on for AC the out door unit will not come on for heat or the "on" setting on the thermostat. See exception 1 & 2 below...

Exception 1- (in a heat pump the out door unit runs in both heat and cool mode unless it has emergency heat turned on then it will not come on outside in the heat mode, and depending on the type of heat pump and furnace or air handler it is). A heat pump thermostat usually has "backup heat" and an "emergency heat" setting switch on the thermostat.
Exception 2 - On some thermostats they are made to cycle on the heat if the temperature reaches a preset temp (around 50'f usually but definitely by 40'f). This mode prevents freezing when if instance the homeowner is away or while the home is under construction. In this mode the fan inside can run but the heat usually comes on with it.
Exception3 - On some electric furnaces the heating strips may be individually controlled and thus not all come on at one time. This may give the feel of no heat especially if the room is cold.

Now there may be other exceptions but Ive tried to give you a heads up on some of the most common ones.
If you need more help please post more specifics about your unit/system as to for sure what switches are set to what setting and what is happening with each. My first though was that maybe your system is OK and you needed to know if the thermostat was working properly.

If this helpd you understand your problem would you please give me as hifgh a mark as you can. Thnaks for using fixya and good luck.

Mar 28, 2009 | Carrier Heating & Cooling

1 Answer

I have a Jantrol heat pump & A/C. It is approximately 10 years old. For the last 3 summers the compressor unit will freeze when the air handler fans fails to come on. It worked fine for 2 weeks this...


Hi,

If you can safely check the supply to the motor when it should be on, then this is the best method to check it.

Check the fan turns very freely - oil the bearings if it doesn't.

If there is power there, but it does not turn, replace the run capacitor.

If this get's you going - Please rate as Fixya so others may benefit. Thanks!

Jun 26, 2008 | Goodman Heating & Cooling

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