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Would the compessor become hot if the compressor start device is broken?

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Not necessarily. When a compressor overheats, It is usually the cause of the coils being covered with filmy thick lint, thus, preventing the heat dissipating effect that is very important for proper compressor function. A broken condenser coil fan will also overdrive the compressor, thus, causing it to overheat and shutdown. The compressor cannot start when the start device has failed. In this case, the relay has failed mechanically and there may be some isolated heat in the area of the start relay device. You can pull that start device off the compressor and shake it. It will normally rattle if it is damaged.

Posted on Aug 22, 2010

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When the tank is empyt the compessor comes on with no problem and runs until it's full, once pressure gets low the compessor should automaticly come on and refill, that"s when the compessor comes...


Hi mcfadden21...

Check and clean or repair or replace your compressor's unloader valve.
The unloader valve is suppose to discharge the compressed air from the tops of the piston heads to the outside to make it easy for the compressor to start when the pressure in the tank drops to the starting point.
Please take time to rate me thumbs up

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If this is happening while compressor is running normally , first check temperature of condenser coils (black tubing)while running. If hot to touch,compressor is ok.(Good news)If not hot ,it's shot,or your defrost heater stuck on.(not likely)

If compessor not coming on at all it could be a control problem.eg thermostat ,or stuck defrost timer.

If compessor wants to come on or you hear clicking ,suspect start relay or start capacitor.


hope this helps

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1 Answer

My compressor is working but my moter having loaded & burn i change another motor the same problem is happening. please guide me. thanks


The motor will run hot/overload if wrong size or too long cord is used. Also if pressure is set too high (most set at 125 ~ 135 at shut-off). In-tank checkvalve will also have effect on motor by loading the compressor at start-up. Easy test. Run compessor till you have over 100lbs in tank then unplug from power. At this point try to turn the motor /pump by hand, it should turn rather/very easily (this test is hard to do if the motor /pump is completely enclosed, you need to be able to turn the pump even if by truning the fan blade). If it does not turn easily let all the air pressure out of tank and then try to turn by hand. If it turns easily with tank empty try one more test. Run compessor till the pressure switch turns it off. Then unplug machine and turn compessor again by hand, should be easy. If not easy then unloader / checkvalve not working. The checkvalve could be leaking air back from the tank loading the pump. Replace parts as needed.

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Jul 05, 2010 | Refrigerators

1 Answer

Smoke at compressor


Your start relay is mostlikey burning up.
Unplug the machine.

Remove the back panel.

There is usualy a black box with wires going to the compressor. take the black box off . it might not have a box and has a wire holding a device on it with a wire. This is the start device. Remove it carfully and inspect it. Yours might be burned up.

A new one might or might not repair your problem.
You might need a new compessor, But is worth trying a new start device.

On all post please provide : Model number and make of machine. and all information about the problem.

Help up Help you :)

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Sounds like your unit may be a bit short of refrigerant and the compressor is therefore cutting out on low pressure.

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do you have voltage at the compressor? if not you have an open circuit or bad t-stat. if voltage is present and compressor is not running you have a bad start device or bad compessor. if voltage present and compressor runs you have a refrigeration issue get a new freezer.

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sounds like the compessor over load is cliking on&off compressor not starting could be a capacitor or compressor or if your lucky a contactor dan

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