Question about Danby DPAC7820 Air Conditioner

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Continues running When I turn the unit off the cooling shuts down however the fan continues to run. The only way to shut the unit down is by unplugging.

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There is probably a stuck fan relay on the circuit board. Have a technician take a look at it to confirm this and then replace it.

Posted on Jul 08, 2008

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My quadrafire 1000 pellet stove works great, but the 2nd fan will not shut off and continues to blow cold air. Any suggestions


when turned off the fans continue to run to cool down and exhaust fumes --turns off when firebox reaches a set temperature

Oct 27, 2016 | Air Conditioners

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When thermostat turned up furnace ignites, heats and fan starts when plenum is up to temp. When thermostat is turned down flame goes off but fan continues to run.


If your furnace is relatively new, as in 10 years old or less, there should be a field adjustable 'cool down' cycle. On the circuit board there should be a dip switch or series of dip switches with 30, 60,90,120 indications. These numbers represent the length of time the relay on the circuit board allows the fan to run AFTER the thermostat satisfies. You may be able to adjust the time frame down one position from where its positioned now.


The second possibility, if the blower never shuts off at all is that the relay itself could be stuck in the closed position and keeping the fan on.

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1 Answer

When I turn my window unit on, it will cool for 2 - 3 minutes. Then the fan turns off and the compressor continues to run for maybe another 90 seconds, then shuts off.


Make sure the filters are clean. Check what mode it is on as well. On heating, it is normal for there to be a delay before the unit starts up and then "run on" when turned off. Also check what temperature is set on it. If the temp is too high, the machine will cycle on and off as it thinks it has already reached the temp you want.

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2 Answers

My Dometic Rooftop 15000 BTU Model 459516.701CO will come on and run and then shut off it continues to cycle within minutes of shutting off it is controlled by a Dometic Comfort Control Center 2...


THE OUTSIDE FAN MOTOR MIGHT NOT BE WORKING CAUSING THE COMPRESSOR TO GET HOT AND TRIP THE INTERNAL OVERLOAD IN THE COMPRESSOR - IF THE UNIT IS LOW IN FREON SAME RESULTS - WHEN UNIT IS FIRST TURNED ON DOES IT BLOW COLD AIR OR DOES THE AIR NOR FEEL COOL - JUST COOL AIR COULD BE LOW FREON - COLD THEN WARMS UP IS FAN PROBLEM

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1 Answer

Ac unit runs, inside blower shuts off after 2 mins, compressor continues to run, t-stat still calling for cool


My central AC unit decided to stop on the hottest day of the year. It would start and run normally for a few minutes and then the blower would shut off. After checking the breakers, thermostat and overflow shut off (did not have one) I saw something about a blower motor capacitor. This was easy to get to and replace and my last hope before waiting for someone to come fix it. The capacitor cost $4.04 with tax and had my AC working again. Needless to say I was beyond happy. I hope this can help others with a similar problem.

May 20, 2012 | Air Conditioners

2 Answers

Cooling begins then indoor blower stops...outside unit continues to run


I had the same problem,if you do not monitor that you will make matters worst and burn the Compressor.your problem is the blower unit it has three speed sometimes four.it needs to be changed..

May 20, 2012 | Air Conditioners

1 Answer

I had a Honeywell Thermostat RTH8500 installed by a pro to run Heat / Cool electric heating WITH central air conditioning. Problem : When running on cool Fan on auto ,it work OK but sometimes when the...


Is this a new hvac system? A new furnace can work differently than your old one. Does it shut off after a minute or two or continue to run? If it continues to run then call that professional back and let him fix it. If it shuts down after a minute or two then it is a feature of the new thermostat to squeeze all of the cool it can from the a/c coil and ductwork.Some of them have settings that you can adjust for blower delay on and off, read the manual that came with the t-stat and see if it does.

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1 Answer

The a/c unit cooling fan shuts down shortly after unit kicks on.


If a fan motor quits working during a cycle it usually means that the thermal protector is turning it off. If you had an amp meter on it, you would notice that it is exceeding the listing on the nameplate, Nine times out of ten this is irreversable, the motor needs to be changed. Sometimes if there are oil ports on the motor, you can add a few drops of zoom spout oil and that does the trick. But usually the motor is already damaged. Good luck.

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2 Answers

Goodman a/c blower fan will not shut off


Unhook the thermostat wires on the furnace. If the blower shuts off then your problem is either the thermostat or the thermostat wires. If it contiues to run check you high limit switches next. If all else fails you most likely have a bad blower relay. On most modern furnaces the blower relay is part of the circuit board.
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1 Answer

Compressor starts and doesn't stop


Relay for the compressor may be stuck ( Contacts welded) both the fan and the compressor should operate at the same time. Have the relay(s) checked and possibly replaced.

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