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My heating system won't stop running, air is just coming out even when it is in the off mode

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Heating relay in the furnace is stuck in on. Replace.

Posted on Oct 07, 2010

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Coolant fan doesn't come on unless I run air conditioner.


"Coolant Fan" is not necessarily a common term used to refer to any particular fan in a standard HVAC system. Are you referring to the "Indoor Fan" that circulates the air within the living space???? OR are you referring to the "Outdoor Fan" or "Condensor Fan" that circulates the air across the outdoor coil ??

If its the indoor fan on an air handler that's not running unless its in A/C mode, it will be a faulty heating circuit fan relay on the main control board.

If its the outdoor fan and its a heat pump system the outdoor fan stops during the defrost mode so there is a slight possibility the system defrost board is faulty and stuck in defrost.

A little more information may help obtain a more specific answer.

Apr 14, 2015 | Heating & Cooling

1 Answer

Why my A/C condenser fan won t stop running, dodge ram 2008


To clarify, the compressor and fan will run in defrost mode. The compressor and fan runs to dry out the air blowing onto the windshield.
Now if the condenser fan runs in "heat" you may have a problem with the fan relay or the main controller.

Sep 25, 2014 | 2008 Dodge Ram Pickup 1500

1 Answer

LG air conditioner the fan comes on when in heat mode but when switched to cool the fan stops


They run on different speeds for heat and cool you either lost a speed for cool or the relay for the cool mode is not closing, Does the compressor come on in cool mode?

Sep 05, 2014 | LG Heating & Cooling

1 Answer

I have an air conditioner Mitsubishi MSZ-A26YV, it has stopped heating, even if it's on the heat setting [sun emblem] and is set to highest temp, only cold air comes out, otherwise it does all other...


It's not indicated to turn directly from cooling mode to heating mode. You must wait about two or three minutes before the change. After the spliter start, you must wait few minutes to get hot air.

Mar 30, 2011 | Mitsubishi MSZ-A24NA Split System Air...

1 Answer

Sometimes the auxilary heat light comes on, and this morning the auxilary and emergency lights were on. Our electric bill has been really high the past two months.


Assuming we are talking about a Heat Pump system with an outdoor condensing unit and an indoor air handler, it is not uncommon for electric bills to escalate during the harder winter months.
Typically, the auxilary heat light energizes whenever the electric strip heaters are in use. These heaters are used to supplement the heat from your heat pump system which will be unable to maintain desired occupied setpoint with outdoor temperatures below 35degF. At outdoor temperatures below 35degF is not uncommon for the heat pump to run non-stop and the electric heaters will cycle on and off as the temp in the house drops between 1/2 to 1 1/2degF below setpoint. The electric heaters will also come on when the system goes into a defrost mode...defrost modes typically last anywhere between 2 - 8 minutes. The emergency lights, depending on your thermostat, will come on whenever the thermostat is placed in EMER HT. Some systems energize the emergency heat lights to indicate there is a problem with your condensor unit.
I suggest you ensure the thermostat is in HEAT mode and not EMER HT mode. Also, while the system is running, step outside and visually inspect your condensing unit. Is it running? Does it appear and sound like it is running normally?
Don't forget your air filter. This is the single most important and most-neglected maintenance item on your system.

If after these steps, you still feel as though you are having problems and would like to try and correct them yourself, please let us know.

I hope you find this information helpful. Good Luck to you! :-)

Feb 26, 2010 | Weather King Heating & Cooling

3 Answers

2009 Street glide idles poorly, strong gas smell, stalls


The 09 models come with a "parade" mode which causes the rear cyclinder to quit firing when idling in traffic etc to combat over heating. You should be able to kick it on by rolling the throttle grip FORWARD for 5 to 10 seconds. Have you changed the pipes or air filter? If you have and never had the EFI adjusted (either factory download or fuel tuner installed) your bike could be running extra rich causing the over heating and eventual engine destruction. New Harleys run rich from the factory, any changes to the intake/exhaust system without proper fuel injection management will cause overheating. Try getting your bike into parade mode by rolling the throttle forward to the stops for a few seconds, that will cool things down.

Jun 28, 2009 | 2008 Harley Davidson FLHX Street Glide

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

Just a little question, guys!


The blower has absolutely nothing to do with outdoor air. Having the T-Stat set to auto lets the blower come on only when the A/C-heat comes on. With the switch in the ON position the blower simply runs all of the time. Depending on your living space (high ceilings, multi-level) having the blower on constantly while costing a small amount to run can actually save some money and make you more comfortable in the summer. However most people will leave it in auto in the winter so they don't feel as if they have a draft from the air movement as the blower is in high speed in fan on position and cool modes and low speed in heat mode. Many furnaces today are equipped with a setting that allows the blower to run constantly at a lower speed or simply run for a min. or two after the A/C=Heat have turned off.

Jan 17, 2009 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

Compressor fan not running


Does it look like the coils are frosting over? Is it steaming? Keep watching, after about 30 min does the fan come back on?

If yes to any/all the above then the unit is probably in defrost mode and yes the fan will stop blowing during that time, but restart when the unit goes back into regular heat mode.

During this time you will likely notice warmer heat from the vents than normal and the "AUX or EM HEAT" light will be on.

That is your backup heat system. It should automatically come on during a defrost cycle.

Dec 06, 2008 | Goodman CLQ36AR49 Air Conditioner

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