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What kind of replacement compressor

My mother's compressor (bristol h21j38babca, part 750178) is kaput. The unit no. is c48acd1vf. What knid of compressor can I replace the burned out one with? Is a 4 ton model too big? What brands would be compatible?

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Compressor only stays on for 2-3 minutes than shuts off

if the sensors are okay, it might be the compressor overheating, my portable ac (moretti elite ac) is also behaving the same, especially when i turn the fan to max. the compressor shuts down about 7 mins and turns on again in about 5 mins, now i found out when i turn to medium or low the compressor runs normally. i think when on medium or low setting some of the cool air directs/channels to the compressor thus cooling it more.

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have you replaced the ptc overload/relay on the compressor,as this is the actual start and run component that the compressor needs or it wont start or run,remove it by unplugging it off the compressor and a good sign if its bad is it will sound loose like pieces loose inside the ptc unit,you should also replace the run capacitor connected to this component too

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Hi.. heatman101, I need a replacement for a dual capacitor, its made by aerovox, it is round & looks like its made of gray pvc plastic. im not sure if this is the part # printed on it (SH 1238). it...

If you have the # off the compressor, you can contact the manufacturer,(Bristol, copeland , etc)
they can tell you by figureing out the horsepower.or your local supply house can do it for you.

Jul 27, 2011 | Heating & Cooling

1 Answer

Unit ices up and quits cooling

There are a couple of things that contribute to the problem you're experiencing:

1. A dirty or clogged air intake filter. Turn unit OFF, remove and clean the filter. If filter is washable
be sure filter is thoroughly dry, before reinstaling it.

2. Cooling fins are dirty. Turn unit OFF, remove the outer shell of the AC unit, if necessary and
clean the fins with an old toothbrush and a vacuum cleaner.

3. Humidity level in your area is extremely high. This is Mother Nature's problem and is not readily

4. Defrost sensor is not functioning properly. Replace sensor.

5.. Low refrigerant gas in the AC's compressor. Have compressor recharged.

Hope this helps you trouble shoot and solve the problem. Please let me know. Thanks.

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1 Answer

I want to know the size of the compressor

.To give you a rough idea.
Each one horsepower of motor, will give about 4 cubic feet per minute.
Without the make & model of your compressor or motor type & size I can't be more spacific I'm afraid.
Kind regards Andrew Porrelli

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1 Answer

Have a bristol compressor fitted to a prototype air con unit designed for military application, been through a TUV vibration test and failed due to pipework failing, pipework repaired, pressure tested,...

Please check your compressor pumping.
How to check?
Keep pressure gauge in discharge pipe and also keep open suction pipe, test run. It builds the pressure up to 300 psi or slightly more than that. If it's less than 275psi, it's defective.

Dec 15, 2010 | Heating & Cooling

1 Answer

What compressor do i need

The compressors that come in units change from year to year and model to model. Depending on the age and type of unit, it could be a Copeland, Bristol....just about anything in the 2 ton range.

Best bet would be to look down and on the top or side of the compressor, you should see a series of numbers that have the model and serial numbers. The model would be the compressor you seek and the serial will help to determine the age of the compressor. Also be sure to look for a name brand such as Copeland, Bristol, Tecumseh, etc.etc..

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Your heat strip is burnt out . You will need a tech to come out and replace this heater strip due to the complexity of installation


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1 Answer

Unit will not power up . there is no power light lit up but power is live

ok..that's good. so the power supply is supplying power to the mother board. just a chance on this one..carefully, after you ground your hands on metal case, remove the memory sticks, and DO NOT touch the gold insert them back in the slots, and see if that helps. if not, then it appears the mother board is kaput, and will need replacing.

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