Question about Heating & Cooling

1 Answer

Air handler fan runs nonstop in heat mode

When this unit is in the heat mode, it seems the air handler fan runs non stop. Also, the fan seems to blow too hard for heat.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 27 Answers

Is this a new problem? the fan speeds can be adjusted by changing wiring connections. If it is a new problem on an existing system then it could be the t-stat or a problem with the curcuit control board. the switch on the t-stat for FAN is set to auto not ON. if set to on the switch to auto - problem solved.

Posted on Nov 26, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Airhandler- the themostat is on auto/I understand cool,heat.emerg heat,The (G) terminal-then why heat mode or,emer heat fan blows?Only when i switch to cool mode the handler still want start up blowing...


the fan fill come on with the sequencer (stack switch you call it) it will also come on with the fan relay. on some goodmans the fan relay is the black box on the circuit board. use a jumper to jump red to green, this should bring the fan on sounds like you could have a broken green wire, try using a different wire instead of green

Sep 12, 2013 | Goodman Heating & Cooling

1 Answer

The compressor runs but the fan dont. The fan runs in heat mode only


fan relay is bad at inside unit(air handler) it has one circuit for heat and one for cold.

Aug 12, 2010 | Goodman CLJ30AR32 Air Conditioner

1 Answer

Rheem Heat Pump outside fan seems to be running 24 hours per day. Outside temp 23 degrees. Is this normal? Model #RPKA-018JAZ


no this is not normal. the fan should stop running when the thermostat is satisfied or when the heat pump goes into defrost mode. if it is running nonstop, there is a contactor that operates the fan and compressor that if it sticks will get line voltage to it. you would have to take the cover off of the outside unit and turn the thermostat to off. If the fan continues to run, you need a new contactor.

Jan 13, 2010 | Heating & Cooling

1 Answer

Heat pump goes str8 to heating strips compressor does not run in heat mode pump was manufactured in 03 installed in 07 and has sat dormant till now could it be wired wrong it is a ruud split unit with...


I think that you have the right idea. The wiring is probably wrong. If you can trace the low voltage wires to the air handler. make sure that the Y1 wire on the t-stat is going to Y1 on the hair handler and then to the condenser. The Y2 wire should be going to Y2 on the air handler and probably does not continue out to the condenser. The Y2 should be going to the contacor that brings on your backup heat. It seems like Y1 and Y2 are reversed somewhere.

Nov 14, 2009 | Heating & Cooling

1 Answer

How far from the house should the outside unit be located?


If your outdoor fan is a vertical discharge in other words if the fan blows the air up from the top of the unit then one foot from house is fine, but if it is horizontal discharge or blows it out the side then the airflow needs to be directed away from the house or the unit needs to be moved away from the house far enough that it doesn’t restrict the airflow.
For the blower running on high speed a 4 ton unit is usually 1600 cfm so on low cfm it may seem like high speed. There should be some speed taps on the indoor pc board and if you look in your installation guide it should tell you what taps you need to get the lower airflow if its not correct.
For the luke warm air in the 2 ton mode, the coil is a still 4 tons but the compressor now is only pumping 2 tons of refrigerant so the discharge temperature and head pressure will be much lower and that is what determines how much heat you get, so you will get less heat. The 2 ton mode is for times when you only need a little heat or cool, when you need more then you will get the 2nd stage which is the full 4 tons of heat.

Apr 21, 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

2 Answers

Heat Pump Stops Working only in the Early Morning


When the unit does what you say does the fan motor outside stop also , if it does that means it is in defrost mode and should kick back over to normal after the system heats up the coil enough

Nov 24, 2008 | Weather King 12AJA4801AH Air Conditioner

1 Answer

Ruud heat pump question


Does the air handler take a minute or two to start, this would be normal so that it doesn't blow cool air into the house before the unit is warmed up. If not could be the fan relay is weak and needs replacing. As far as the outside unit it sounds like you need to check the refrigerant. In cooling they are 70/150 psi. This should be checked in cooling mode, once you turn it to heating mode the pressures switch bring heat inside the house instead of out. I hope this helps.

Oct 23, 2008 | Ruud Heating & Cooling

2 Answers

Fan runs constantly on cool mode


Simple Question: Did you check to see if the fan switch on the
t-stat is in ON or AUTO? If ON the fan runs nonstop. If in auto the fan cycles with the outdoor unit.
next does the fan shut off if you turn the t-stat to off?
A stuck relay should keep the fan running all the time.
Sometimes if the relay is stuck you can whack the side of the Air Handler and the connection will break.
Sometimes instead of a relay there is a stack switch.
It's a little black stack of 3 disks this is a bi-metal switch.
they do get stuck more often than relays.
The fan relay may be on a electronic board. I don't know for sure without seeing your unit.
Good Luck Phil

May 18, 2008 | AmcorAire UCHW-H12AF2 Split System Air...

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

138 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2047 Answers

Dan Webster
Dan Webster

Level 3 Expert

8205 Answers

Cris Sparks
Cris Sparks

Level 2 Expert

338 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...