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My heat pump unit outside unit works.The attic furnace and air duct fans just stopped working.I'm not getiing manual fans either

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  • Danny Clark
    Danny Clark May 11, 2010

    How many fans do you have on this system?

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  • 146 Answers

Bad blower motor or relay

Posted on Jan 19, 2009

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1 Answer

My(38ycc030340)carrier heat Pump ac unit blows 5 amp fuse on board in handler in attic when switch stat to heat.


Miss wired or shorted low voltage wiring. Have you changed stat? Animal chewed wires at foundation wall or in attic?

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Central a/c fan will not start after flood


replace the fan motor as the bushes are dry and seized up.

Jun 09, 2013 | Air Conditioners

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I want to know what temp to expect out of my register if for example the outside air is 90 and the inside air is 72 and if their are any other specific details(not interested in hooking up my gauges...


Hi,
For comfort cooling w/ r22, you can expect a delta- t of 20 degrees F across the evaporator, or a seventeen to twenty degree drop from return to closest supply grill, so if your return air temp. is 72 degrees, you should see from 52 to 55 degree air temp. at grill.
Other factors come into play as well, how well insulated the duct work is, r-6 is industry standard now, and how well insulated the attic space is as well as temp of attic space, ridge vent works well, and so do solar barriers to keep heat out of attic space.
This should help.

Jul 27, 2011 | Air Conditioners

1 Answer

I had my a/c charged today because it has not been cooling the house down. It took less than a pound, but it still blows worm air. Fan and compressor all running. I cleaned outside unit, filters, replaced...


It could be that it is not charged correctly. Check the insulated copper
line outside if it is sweating and the condensor is discharging hot air, then the ac is doing all that it can. Check the evaporator inside to see
if the drain has condensate coming out of it.

Getting the heat out of the attic is a good idea, but you must have enough make-up air in the attic for the fan. If you do not have enough
make up air, it will start to draw air from inside the house. One way to check this is if you have a gas water heater and or furnace. If you put
a flame by the exhaust pipe in the basement and it blows it out, then you now have a backdraft problem.

Run the AC withoutthe fan, my real guess is the unit is not properly
charged or you do not have a big enough AC unit.

Jul 17, 2010 | Goodman CKL36AR36 Air Conditioner

1 Answer

Heater keeps going off on its on also fan not


Please provide more info. When it goes off does it come back on by itself or do you have to flip a breaker? Is the furnace gas or electric? If it is not moving enough air across your heat exchanger in a gas furnace or across electric heating elements this will trip a safety switch that will stop heating but not fan. Low air speed is most likely from inexperienced or improper duct design/ installation. Duct sizing is very important to move enough air. Don't believe me try breathing thru a straw. If your unit is a gas furnace it has a flashing code that will tell you what is wrong codes listed inside unit door. Could be lots of things. Reply with more info.

Dec 04, 2009 | Goodman Air Conditioners

2 Answers

The outside unit is not working on my Heil Air conditioner


The attic fan is not a part of your a/c system, and you should not run it while you are running the a/c. If you are currently using the attic fan, it is possible that someone wired it so that the a/c won't turn on while the attic fan is on. Otherwise if the thermostat is set below room temp, and says it is calling for cool, then the problem is most likely coming from an issue at the outside unit itself. Make sure to check your fuses, at the fuse panel and outside breaker. Hope this helps

FYI.. the only part of the system that might use batteries is the thermostat.

Jul 28, 2009 | Air Conditioners

2 Answers

My AC unit wont blow the cold air.


if the ac outside is working, but not the furnace, means there is a control problem with the furnace, check wires in the furnace, make sure there is a blower wire plugged into the contact marked cool on the control panel of the furnace

Jul 09, 2009 | Fedders A&B Chassis A1A07W2B Air...

2 Answers

Furnace runs on heat, air conditioner does not


If you have a Gas furnace in the Attic then the answer is yes. The outside condenser will not run if in fact you have a gas furnace.

Feb 11, 2009 | Ruud Central System Air Conditioner

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

3 Answers

Blower in Attic not running


inside unit has fan control relay , either on control board or can be separate ,except for the 24 volt transformer and the t-stat the units operate separately concentrate totally on the inside unit this is where the problem lies

Oct 23, 2007 | Ruud UAMB Air Conditioner

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