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How to bypass a run capacitor on small air compressor

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I have an Amana heater/airconditioner (Prestige I think) that is not cooling. The outside compressor fan was not spinning, so i I changed the capacitor on the unit. It now spins, yet vent air not cold

If that fan stopped your compressor overheated, shut off on thermal overload. Carefully cool compressor with water hose and restart. If the big copper is cold ,small copper warm, compressor is running. Check capacitor on compressor

Jun 06, 2016 | Amana Heating & Cooling

1 Answer

Portable generator stalls when load applied

Connect the air compressor to house plug and check amp draw with tester. More than likely you will find that the initial start amp load is too great for the generator. Do not rely on the information stated on the compressor. Generators and air compressors do not get along. At our repair shop, we find that most contractor /construction type generators that were used for running air compressors had failed or leaking capacitors and were not producing correct amount of power. You could have gen set with weakened capacity and air compressor that is drawing more than stated on plate. Good luck

Mar 08, 2013 | Hammering

1 Answer

Air compressor on Heil air conditioner is humming but not kicking in

Capacitor Failure Symptoms are sometime harder to identify without the right tools and expertise. Capacitors can be found in several different sizes and shapes. There may be one or multiple capacitors included in your ac with regards to the design. While the most popular capacitors are the types found on circuit boards, the ones most associated with air conditioning will be the bigger capacitors that assist start and run your motors. There are several motors present in an conditioner and heater systems:
  1. Compressor Motor Run Capacitor: Here is the most popular capacitor that fails. Most of the time these are duel capacitors, which means that there are 2 capacitors built into one. A duel capacitor will have three terminals on the top where a single capacitor will simply have two terminals on top.
  2. Outside Fan Motor Run Capacitor: That is the smaller capacitor found with or part of the Compressor Motor Capacitor. It helps start and run the outside fan that blows air through the outside coils.
  3. Indoor Blower Motor Run Capacitor: Similar to the outdoor fan motor capacitor, it is a small, single (two terminals) capacitor that will help start and run the indoor blower motor.
  4. Start Capacitor: Some models include an auxiliary start capacitor that helps jump start the motors. Most are found on the compressor. These are less common.

You may need to get that checked out.
Air Conditioning

Oct 16, 2012 | Heating & Cooling

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I have a ( Goodman CKL-49 1 ) fan was not running, I used a small wooden stick to get it to run. fan is now running but cold air is not being produced what can I do can you please help?!

The split run capacitor in the condensing unit is bad. It needs to be replaced. The reason the system is not cooling is because the compressor it not running. The capacitor is needed for the fan and the compressor to run properly. That is why you had to give the fan a kickstart with a stickstart.
Hope this helps.

Sep 08, 2011 | Goodman CKL49AR49 Air Conditioner

1 Answer

I have a 38ckc036750 A/C Unit and the fan run when the contactor closes but the compressor dont, the is a hard start capacitor that is across the run capacitor. what must I do to get the compressor going....

many technicians make the mistake of using a hard start kit instead of replacing a bad run capacitor, the problem is that it can be ******* the compressor, and the start capacitor can also go bad, you can start with removing the capacitors and replacing with a new run capacitor and see if that gets it running, also can try another start capacitor with the new run capacitor, some manufactures engineer there systems in that way, if not the compressor may be done. *Be sure to check all the electrical connections including those at the compressor under the terminal cover.

Aug 22, 2011 | Carrier 38CKC036 Air Conditioner

2 Answers

Compressor is not getting on but fan is working fine and i noticed the fan out air is not hot

If the compressor is not working then for sure your AC is not working. So first of all we need to check why the comrpessor is not switched on. Need to check on the thermostat if the relay is activating according to the set data.
If so the comrpessor relay must work or both compressor and relay can be faulty. Check also the capacitor to the motor.
The main controller must give the output to trigger relay, Can be bypassed to confirm status of compressor /relay/capacitor or else the main controller board can be faulty.

Sep 11, 2010 | Samsung AS18A6RB Air Conditioner

1 Answer

Rooftop a/c unit fans runs but when i turn it to ac it trips the breaker. what do i need to do?

If it is tripping the breaker when the compressor is trying to kick on, then you probably have a bad start capacitor. Remove the upper shroud and then the small access panel on the side of the unit. Make sure the disconnect power before accessing this panel. In this area, there are two to three capacitors (depending on the model). The start capacitor has a small black relay on top of it, visibly inspect that for char or burn marks, if there are any, then replace that capacitor and relay(PTCR). If there are no burn marks, then you need to have the compressor checked out for shorts or open windings.

Hope this helps,


Jul 06, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Home unit 3 ton won't run

The small capacitor is for the fan motor the other for thecompresor .You can try conecting a booster (or hot start) in paralel to the comp.capacitor .If this doesnt work you have to replace the compresor.

Mar 29, 2009 | Heating & Cooling

1 Answer

Haier AC Problem Troubleshoot.

Your compressor is faulty, you could test this with an ohm meter or a mega tester to confirm that you have continuity between windings and earth or that the insulation on one of the start or run windings has overheated and broken down. Before you give up though, you can try to change the compressor capacitor, with same rated microfarad capacitor.

Jan 16, 2009 | Haier hwr10xc6 Air Conditioner

2 Answers

Builds pressure, will not cycle back on and leaks fluid

Your compressor is most likely made by Campbell Hausfeld. The oily substance could be leaking from the capacitor on the motor. Remove the cover and examine the capacitor for failure. There is a value printed on the cap. (uf) The cap must measure to within 95% of printed value. A failing capacitor will cause the hum that you are experiencing.

Dec 27, 2008 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

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