Question about Heat Controller PE121A Air Conditioner

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Air conditioner not working.

The compressor tries to cycle on but just makes a noise. It does this every 15 to 30 seconds. The whole time the fan is running. The unit is made by Heat Controller Inc. and also has Comfort-Aire on the side. The model # is RSD1036-1 Rev:WI Serial # BS317525 o43X Had a guy come out frist part of the summer and install a hard start cylinder but it appears that was just a bandaid to a bigger problem. I've also tried looking up this unit to see what waranty it may have but am not able to find anything.

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  • 396 Answers

Assuming this is a dual unit heats and cools. You may have a sticking transfer valve or a defective compressor. The trf valve simply switches the cool to the heat. Suggest you contact a qualified ac technican.

Posted on Sep 08, 2009

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Whynter Portable Air Conditioner Model: ARC-14S. Problem: It sounded as if something fell inside the unit while it was operating (cooling) then it started to vibrate horribly. The vibration is only...


Hi,Whynter Portable Air Conditioner has many moving parts, and they all make noise and cause vibrations. Some of these parts are more likely to causing shaking and loud noises, and sometimes this signals a larger problem, something to watch and scrutinize. If serious enough, it calls for a repair.

Loose Parts

Loose parts cause the majority of shaking and vibration noises in your air conditioner. A few of the most common loose parts include the air compressor, the piston rods and even the fan or blower unit itself. These noises are clunking, clanking sounds that occur along with a vibrating action. The only method of repair is a complete compressor replacement, which is a repair only a certified air conditioner technician is qualified to make. The compressor is a fully sealed component, so individual parts in the compressor cannot be repaired.

Fan Blades

Fan blades cause noise, shaking and vibrations even when properly secured. If fan blades contact the exterior structure of the air conditioner due to a bent fan blade or broken and misaligned grate, a constant, repetitive noise and vibration results, which sounds like a ticking or banging from the interior of the air conditioner. Vibration in this case is limited but still present.

Mounting Brackets

When an air conditioner shakes, there is a problem with the mounting brackets. These brackets hold the air conditioner compressor steady as it operates. Normal vibrations and shaking would otherwise occur without these brackets. A loose mounting bracket causes the air conditioner to rock back and forth and creates a clanking sound. As the compressor starts up, this rocking and clanking sound begins, resulting in a very loud and fast vibration and noise. It also occurs when the unit shuts down.

Other Sounds and Vibrations

Sometimes air conditioners squeal, hiss, hum or screech. Each noise is often accompanied by a vibration. Humming sounds along with a vibration may indicate a bad capacitor, the electrical part responsible for starting the machine. Hissing sounds tend to indicate a pressure problem while screeching and squealing sounds are fairly common in window air conditioners and in central air conditioners. This sound is also a result of the compressor motor. It usually starts when the unit turns on and continues through its normal operating cycle. Vibrations always occur in the air conditioner due to moving parts and the compressor motor's operation.


Hope it helped..

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Carrier 38CKC036350 condensor fan not spinning makes humming noise compressor hot fan can be turned by hand


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Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...

Air Conditioner Trouble - Review the Possibilities

heatman101

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Make make a labor some noise at some time , compressor starts and


I have the same problem....throw this unit out and never buy Danby....shame on Danby for selling junk....

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Sounds like bearings are out on the compressor. I'm assuming that it's not the fan motor making the noise, cause if it was - and the fan motor is cycling on and off - it (fan moter cycling on/off) will also cause the compressor to cycle on and off.

But, since you say it's the compressor (from which the noise is coming from) I would have to say the compressor's bearings are out and since it's a hermetic (sealed) compressor - your only option is to have a service tech check it out to be sure.

Note: I think you are correct (in thinking) a thermal overload is cutting off the compressor, because the compressor does have a 'saftey overload' built internally in the compressor just for that reason.

good luck!

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If the fan and compressor are both running and no cold air


are you sure the compressor is operating,can you hear it cycling over the noise of the fan???if its not its probably got one of 2 things wrong,rapid cycling or no comp operation: low refrigerant, no start condition: capacitor or contactor

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Sounds like the compressor is the one making the "NOISE". If the sound sounds like something trying to start, then kicking off, its probably the compressor and not the fan. Hence no cool air.

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My new Kenmore window unit 76081 makes loud rattle


If it does not make the noise when the fan is ruunin you may ahve abroken sping in the compressor. Make sure you Window unit is level. If not the compressor will knock on the inside. Rusty

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It is probably a failed run capacitor for the compressor. Without the capacitor, the motor can't even try to run, but it will draw extreamly high amperage until it trips the thermal overload (avarage trip time 5-10sec) after it has a few second for the safety to cool off, it will try again. Either that or the compressor truly is seized

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COLMAN TSR


3000 Watts is a little short on the power necessary for the compressor to restart. When it compressor starts it may draw 27 amps or more for a split second. 3000 / 120 = 25 amps. when the fan slows down it is telling you the voltage has dropped and it doesn't have enough power. After the pressure has balanced out in the A/C system the compressor can start against no pressure difference.

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1 Answer

Haier ESA 3185 AC won't cool; makes escalating loud vibrating noise near front panel/ filter


Have someone check the run capacitor of this unit. If the run capacitor is bad over shorted it can cause the unit to run and short cycle on a current overdraw. This makes for an electrical imbalance in the compressor motor. Next step is the compressor is faulty.

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