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Unit keeps shutting off


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My indoor unit on my heat pump will not shut off. The electric heat keeps running, and the fan keeps running. It only happens when it is really cold, like 25deg or below, above that and it functions fine. The outdoor unit shuts off, but the indoor stays running. I do HVAC work, but I have never seen a problem like this. I have switched the stat out, and its just so strange. I figured the relay may be stuck, but if I turn the stat off, it turns off shortly after which tells me it may not be the c

I would venture to say your stack relay is getting stuck. either that or you have a short in your low voltage wiring somewhere that is not always making contact....or it may be making contact through another median...like ice or frost. Remember ele ... Intertherm P3RA-036K Air Conditioner

I turn on the Central A/C unit with the thermostat. The attic fan unit goes on and the system cools the house. When the system shuts down the fan unit shuts off but the outside compressor keeps running. The only way the outside compressor goes now off is when I flip the 240 switch on the main box. This just started. Is it a thermostat problem? Thanks.

Could be a thermostat problem but even more likely the contactor on the unit outside is stuck. In order to change this part you will have to get in to the outdoor unit. The contactor is the automatic switch that the thermostat energizes when the t ... Air Conditioners

I installed a new colman mack thermostat in my camper witch has a colman ac unit now ac unit runs 5 min then shuts off for 3 min then starts again and keeps doing this . so I by past thermostat and it will keep runing and cool down camper good that way do I have a bad thermostat or the wrong one part number on ac unit is 7330-730 part number on thermostat is ap7862

If it is a programmable thermostat you can unhook thermostat and when it comes on select 3 instead of 1. As it sounds as though it is short cycling this happens in older houses with drafts. Hope this helps Tim ... Coleman Mach III Air Conditioner

Carrier 38 leo 30320 ac unit....when the compressor shuts off the fan keeps running. a rap on the control panel shuts it off. I when changed the contactor the inside unit stopped working so I put the

Hello, if the indoor blower runs nonstop a relay in the intergrated control board faulty and the whole board must be replaced, you can get tap the board to stop the blower but eventually the board will need to be replaced. If the contactor is clicki ... Carrier Air Conditioners

I have a Coleman Heat Pump, The unit all of a sudden just keeps running, and wont shut off. The only way to shut it off is to turn the breaker off..Will this hurt the unit by running all the time...I need help to figure out whats wrong with it..

Hi,\012Yes, that will hurt it.... the contactor has wleded shut and keeps it running...\012 \012 \012Here is a tip about trouble shooting your ... Coleman Air Conditioners

I have a chigo kfr-51gw/gx1a two piece air conditioner that runs in cool for 10 minutes then shuts down for 3 minutes and keeps repeating cycle while The indoor units fan keep running I've read that this unit has a dehumidifier mode that dose this same cycle. If this is what it is doing is it possible to stop this mode from cycling Thanx

... Air Conditioners

48xp my carrier 48xp-060090311, has a slow down mode with blower to keep blowing after compressor shuts off. It suppose to slows down and keep blowing at a slower speed so as to save money by having air blow across coils. It does not slow down now and compressor stays on for long time. Some times it gets warm other times I have to raise temp. to get unit to shut as it gets too cold.

... Air Conditioners

Unit spits after it has been on for a while, i shut it off because i am affraid it will harm the unit it if i keep it on when it is spiting out ice and what can i do to correct the problem also should I shut it off and if so for how long .

If I understand what your mean is water is being blown out with the air. This will not really hurt anything but the water is supposed to drain out the part of the a/c which is outside the window. It could be stopped up or it's so humid it can't evapo ... Maytag M7D24E7A Air Conditioner

I have a 98 Sunnybrook w/Dometic Furnace-A/C thermostat control. Just the other day, the furnace would keep running and it got very hot in the trailer until I could shut it off. The thermostat was set kind of low, but we needed to keep a little heat on in case we got a freeze. Do I need to replace the control unit which is electronic to correct the problem? I am assuming the thermostat went bad, but am also assuming it is a part of the control unit?! Thanks for your help. Dave

... Air Conditioners

My samsung split system a/c keeps shutting down, with the mode light flashing on the indoor unit. This unit is installed 30' up the side of the house - is it not getting enough freon and there shuts down?

I have a MH050FX A2 that is two head unit and they run only one at a time, when I turn both on, one will shut down. I get an error code of E2 01 with a, I beleive correction code of U C8. Can you help me with a diagnosis??\015\012\0 ... Samsung AS18A6RB Air Conditioner

My Rudd Achiever 10 ran on air setting flawlessly this summer. Now that I am using heat, I have a problem. I get heat into the house; however, the outside unit keeps shutting down after a few minutes of service and I keep having to walk outside to the unit to press the reset button. Can I troublehoot and fix this on my own?

The reset button usually is related to refrigerant pressures, and should be checked by an epa certified technician. ... Ruud UBHC Air Conditioner

For some reason the unit keeps shutting itself

We have a solution to this link that will help\015\012http://www.fixya.com/support/r6019270-refrigerator_freezer_air_cond ... Haier hwr10xc6 Air Conditioner

Our fan for the intertherm p3ra-024k will not shut off. We have put new wiring from thermostat to unit. He pulled the green wire like the serviceman told him to when he serviced it and it still keeps running. The only way it will shut off if you shut the power off to it. Any Suggestions?

You have a problem with the wiring somewhere it could be in the thermostat. When the service man said pull the green wire off that was the power to the fan. The thermostat should wire up as red to the R terminal on the thermostat this is the 24 vol ... Intertherm P3RA-024K Air Conditioner

I have a Carries Mod# 24ABR348G510 Condenser unit. The system start with a normal cycle for about Three min, I've timed this to be this way every time the system is started. After the Three minutes the contacts starts to chaters. The 24 volt control voltage is up and down the scale and the condenser unit thin stalls and shuts down? I have Twelve of these units to keep maintained. The head is to be OK and the system is clean and the Thermostat checks out to be OK.

Hi,Did you already check the exhaust or the motor unit, the possible that has problem on there was the electric contactor, this was the switch the make the main motor to power, if this one was faulty it will have a problem just like the o ... Air Conditioners

Thermostat ? no matter what temperature is selected, the compressor keeps running and doesn't cycle off.  compressor shuts off when just fan is selected, but cool mode just keeps chilling.  unit is six months old. energy saver does not work. unit just keeps running.

I'm thinking the bi-metal is working, that's why you can hear a click, but the contacts are welded together. The bi-metal doesn't have enough strength to break the weld. Time for a new thermostat. ... Air Conditioners

I have a Goodman A/C unit model number AWUF36106BA and serial number 1010684384. It keeps shutting off on us and we have had a repair man come out and said the problem we had is the emergency shut off related to the drip pan is kicking in. As a temporary fix how do i reset the shut off?

If the drip pan switch is shutting the unit down , this means you have a condensate drain issue. Be careful about wiring around any safety switch, especially if the furnace is in the attic or on a second floor. You could have water dripping on the c ... Goodman CKL36AR36 Air Conditioner

Outside unit keeps shutting off after 15 to 20 mins.

When compressors are on their way out, this is a symptom that is common. ... Carrier 38BRC036 Air Conditioner

I have an older model AG 08 series GE window AC unit in my wine room to keep it cool. The unit is cooling fine, but the fine will now not shut off. What could be the problem

... Air Conditioners

Thermostat won't go lower than 80 degrees. Set point is 77 and unit keeps shutting itself down after it starts.

... Honeywell PRO 4000 Programmable Thermostat 1005

My AC My Compressor keeps kicking off. I turn the unit on, the fan works. The Heat works but the compressor turns in about 60 sec. If I unplug the unit and turn it back on, it comes on but the compressor shuts off again after 60 sec. Can this be from dirt in the coils? They have some build up. Any other causes?

One might think so, YES the compressor is running till it gets hot and tripps on hi-temperature, and after it cools down awhile, the switch willcautomatically reset itself and back- & forth......Thank-you-very much! ... GE Zoneline AZ38H12DAD Split System Air Conditioner

When unit is turned on low setting unit will not shut off fans. they keep running.

Hi,\015\012With out knowing exactly what unit you have we cannot solve your problem...\015\012Here is a tip that will help you to get better results from your question on Fixya.\015\012 ... Air Conditioners

Trane xe 1000 - 1/4 fan motor went bad - I replaced it with a used 1/3 from another trane unit - it had same wiring harness etc everything starts, runs, cools -cold air - but only for about 5 minutes...then condensing unit shuts off - inside blower keeps running though... I'm thinkin thermostat....you?

Did the 2 fans have the same rpm. If there is not enough airflow through the outside unit the compressor will shutdown on high discharge pressure. Also make sure the fan blades are positioned right if there is a shroud for them. Did the other motor h ... Air Conditioners

Have a GF500 Monitor Propane Heater - keeps shutting down. Once it reaches the set termperature the burner begins to back off, and then the "burner status" buttons start flashing and the unit shuts down. Restart - does the same thing, but will run on and off for a period of time fine.

This sounds like your thermo-couple has a short, or is defective, it is supposed to kick off at the set temperature, then turn the burner back on after it cools down, a temperature probe is usually coonected o this as well, either one of which could ... Air Conditioners

My unit's compressor will intermittantly stop working. The thermostat seems to keep the intake unit working but since it can't get the temperature down it never shuts off. We have been removing the batteries and letting the thermostat reset for 20 minutes. (thermostat Honeywell RTH23110B). After the reset the compressor will work again but will fault within a day. I am pretty sure that the compressor and fan are functional as if I press the contactor down it begans functioning. I also, to he

If the air handler coil is clogh , the air won't go through and the compresor will shut off on overload because of high head pressure, also this will happend if the condenser coil (outside) is blocked or if the fan dosn't work .Also if the outdoor un ... Air Conditioners

Cooling well it starts just fine cools for about two minutes then the compressor shuts off unexpectedly? i thought it might be the thermostat? i bypassed the thermostat completely but no luck? i can here the compressor come on when the unit is switched on and it does appear to cool down before the compressor shuts off and the fan keeps running.

Check if the condensar ( outside fan unit) is getting enough free ventilation. IF there is no free air flow you will mostlikely be triping the unit due to short cycling. Ie the unit is pulling its own discherge air causing the compressor to trip due ... Haier HPAC9M Air Conditioner

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