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My AC won't work the thermostat is blank. I checked the breaker and it was not tripped so I tripped and reset it but still the AC and thermostat will not work. Any ideas?

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Sounds like the float switch is tripped. Check the drain line for a piece with 2 wires. Pull this out and check for water. DO NOT LEAVE OUT, must vacuum or clear drain line. Good Luck!!

Posted on Apr 16, 2017

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Check the batteries in the remote

Posted on Apr 15, 2017

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What to do when an 8022c wall thermostat screen goes blank - no numbers, just the lines dividing the three areas? Pushing reset does nothing.


Pop the cover off and check the battery. Replace if necessary. If it still doesn't work trip the main breaker for the ac unit off wait 1 minute and turn back on. If it still does not work then you have a more technical proble. Could be a bad thermostat or control board in the ac unit.

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I turned on the ac but the compresser did not go on


Many thermostats have a 3 or 5 minute time delay. If that is not the issue, check your breaker box. If after resetting your breaker it trips again leave it alone and call an HVAC company for service

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My goodman furnance will not bow out air only the fan works . what should i do


Check all the easy things first. Check that all the settings on the thermostat are correct for AC. Does the AC unit run? If not check the electrical panel breakers to see if the AC unit breaker is tripped. If it is tripped, reset it. If it continues to trip, call are reputable service company. There are little or no items for "do-it-yourself" unless you have the training and equipment to service AC. Good luck.

May 16, 2011 | Goodman CKL30AR30 Air Conditioner

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Air conditioners switched off last night only the kitchen one is working and one bedroom, we have 7 bedrooms 3 receptions, control panels are manufactured by General Electric and the display is blank. For...


If it is more than 1 AC, It is most likely an electrical problem, check the circuit breaker panel for tripped breakers, Check if the AC is plugged in to the wall, That a small button on the receptacle is not tripped this could be in any room on any receptacle, 2 small buttons, one says test and the other says reset.

May 10, 2011 | General Heating & Cooling

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Honeywell digital thermostat went blank, ac unit wont come on, its an 8400c, no breakers tripped


This thermostat has batteries. Try replacing the batteries. You may have to reprogram and make sure it is on.

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My unit was working fine until 3 days ago when the breaker tripped, I reset the breaker and worked fine for a day then tripped again when it tripped both the ac breaker andthe main in the trailer as well...


High amp draw can be caused by a few different things, so first check that incoming voltage to trailer is sufficient. (115 volts) Not unusual for some parks to install more hydro hook-ups on a feed line, and when all are up and running, your incoming voltage could be decreased. If your o.k. that way, then I'd start looking at the compressor circuit of your ac, in particular, the compressor start-up capacitor. The capacitor basically stores electricity and boosts it to higher voltage for compressor and fan start-ups to reduce current draw that will trip the breaker. Please have a knowledgeable electrician, or RV tech check this for you, as a capacitor can give a real good high voltage (possible fatal) shock, even when power is off to unit. I also suspect that the start relay has shorted (welded) itself due to high amp draw situation, and that is reason it comes on by itself.

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1 Answer

HONEYWELLTL8230A1003 THERMOSTAT, THE SCREEN GOES BLANK THEN ON F


Well, it's an be only one of three things then (in order) -

1) Bad wiring connection, particularly the middle pair of white and black wires connected to the supply wiring, or
2) One of the breakers or fuses has tripped or blown, or
3) Bad thermostat.

If 1 is OK, check 2 (double check if breakers, sometimes they don't look tripped when they are), and lastly, take the stat back and get another one.

The ground is secondary, and it is assumed your living in a house where 14-2, 12-2, or 10-2 with ground was NOT used. If it was, hook up the ground. If not, it's OK. The grounding requirement was added to the NEC after your house or whatever was built. It is not electrically active or needed for this circuit.

Reply back what your findings are. Will be glad to help!

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Accidental short/spark - what part did i ruin?


YOU HAVE TOUCHED A HIGH VOLTAGE WIRE TO GROUND AS I READ YOR STATMENT. THAT WILL CAUSE A HIGH VOLTAGE BREAKER IN YOUR DISCONNECT OR MAIN PANEL TO TRIP. YOU CAN FIND CONTACTOR IN OUTDOOR AC MASH IT IN WITH AN INSULATED SCREWDRIVER AND SEE IF COMPRESSOR COMES ON . IF NOT YOU HAVE NO HIGH VOLTAGE TO UNIT FIND AND RESET BREAKER. or YOU CAN GO TO MAIN PANEL AND ALL DISCONNECTS AND CHECK FOR A TRIPPED BREAKER. REMEMBER MOST BREAKERS TRIP TO HALF POSITION, BUT CUTLER HAMMERS TRIP TO OFF POSITION. THE THERMOMSTAT CONTROLLED SWITCH IS CONTROLLED BY LOW VOLTAGE THAT TELLS IT WHAT TO DO, BUT THE WORKING POWER IS USUALLY HIGH VOLTAGE IF ANYTHING HUMS ETC YOU HAVE LOW CONTROIL VOLTAGE BUT IF CONTROLS CLOSE AND NOTHING HAPPENS YOU HAVE LOST A LEG OF POWER OR BOTH LEGS. LOCATE TEST AND RESET ALL SOURCES OF POWER ( HIGH VOLTAGE)

Oct 24, 2008 | Heating & Cooling

1 Answer

I have a Carrier 38tra048340 ac 4 ton unit outside, heater in attic. Thermostat is Totaline P374-1100. Power went out than back on after a few hours due to vehicle crashing into power pole. AC was running...


Blank screen sounds like a fried thermosat. Abrupt outages can affect certain types of thermostats. Make a jumper wire and jump across R and G. See if you get any action from anywhere. If a fan or compressor kicks in you know you have a burned out thermosat...

Jun 23, 2008 | Carrier Heating & Cooling

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