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A/C comes on, compressor runs. Changed out blower motor, and capacitor, transformer, and contacts. But the heat strips still come for some odd reason, and cant figure out what is wrong. Contacts by the strips was stuck together, more or less burnt up. What else could be wrong.....

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The thermal relay that controls the elements is probably welded shut. If elements come on and turn off with the a/c then something is wrong in the low voltage wiring. You will need an amp clamp meter to see which element(s) are running, check both wires going to each element as an element can break and short to ground causing it to run somewhat. Once you find what element(s) are running, trace the wires back to the sequencer. Check the bottom terminals on the sequencer for 24v. If you have 24v at sequencer, you have a problem with the low voltage wiring, if not then the sequencer has failed and must be replaced.

Posted on Jun 20, 2008

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I have a Goodman phkj036-1f and the unit sounds like its kicking in and then right back out and not putting out any heat. A/C works like it should but heat doesnt


Sounds like the blower motor is wired to the load side of the A/C contactor relay/. In this condition the blower will only run when the compressor is running which is ok for a heat pump but if you are running electric heat only the blower motor needs one wire to the line side and one to the fan relay. That way the blower will run with heat or a/c. When the blower wont run the heat strips thermal protection will cycle them on and off

Nov 16, 2014 | Air Conditioners

1 Answer

Why won't the compressor run


This can be for a variety of reasons. It ranges from something as simple as no supply power (blown fuse, open breaker, faulty contactor, or run capacitor) or it could be more serious as a grounded or open winding in the compressor motor. My suggestion to any novice and or person without proper tools and knowledge; First check the low voltage (24 volt control voltage) by turning on the "Fan on" switch located on the thermostat to on, not "Auto" The blower fan should come on, indicating there's 120 volt and 24 volt available. Fan doesn't come on is an indication that there's no control power. The next step would be to check for power at the transformer and fuse located in the air handler. There should be 240 volts feeding the transformer, and 24 volts coming out. The control voltage is needed to operate the thermostat (which is the switch that sends the 24 volt signal to the compressor contactor to turn the compressor on/off. This 24 volt also powers other relays and switches in the system. knowing that 24 volt is available also tells you that the problem is most likely in the condensing unit (outside, where the compressor is located). At the condensing unit you should check for 240 volt supply power. Upon finding 240 volt supply power the question now becomes whether or not the thermostat is calling for anything (cool or heat if the unit is a heat pump). There should be 24-30 volt available at the small gauge wires feeding the contactor coil. While having the thermostat set at a temperature lower than the current room temperature (in the cooling mode) the thermostat should send a 24 volt signal to close the compressor contactor and turn it on. The non-metallic end of a screwdriver can be used to depress the moveable part of the contactor. After pushing in the contactor, should the compressor start then you may only need a new contactor. It may just hum because of a faulty run capacitor or grounded or shorted internal motor windings (grounded or shorted windings are usually indicated by tripped circuit breaker and/or blown fuse). It's a good idea to have a good multi-meter and knowledge of use before attempting any repairs or diagnosis on your own. I recommend some basic knowledge of electricity before even thinking about attempting any repairs or diagnosis.

May 08, 2014 | Goodman Manufacturing Goodman GSC130421...

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 | Air Conditioners

2 Answers

Cooling begins then indoor blower stops...outside unit continues to run


I had the same problem,if you do not monitor that you will make matters worst and burn the Compressor.your problem is the blower unit it has three speed sometimes four.it needs to be changed..

May 20, 2012 | Air Conditioners

2 Answers

Transformer keeps blowing on the high side after about 15 Min? Have changed out many transformers and blower motor.


Replace the transformer with a 75va resettable transformer.
Check all wiring for a loose connection at the unit and the disconnect and the breaker panel.
Double check ground wires.
Check the low voltage side for a back feed short from a faulty component.
Could be caused from a bad thermostat wire.
Do a continuity reading on stat wires to look for a short.
Do an amp draw reading on the unit to determine an increase in amperage.

Jul 18, 2011 | Ruud UBHC Air Conditioner

1 Answer

Fan will not turn on. heat coils heat up but blower will not spin. i installed a new blower motor and a new control board but still getting same results


When you changed the motor, did you change the capacitor? If the motor hums, but doesn't run, the capacitor may be the problem. Also, about a week or so ago, I changed a furnace blower and capacitor only to have it shut down again after 2 days. I talked with the vendor, and they told me that they had received a "bad batch of motors" and replaced the one that I had purchased.
If you didn't replace the capacitor, you should, then I would suspect the motor.

Best regards, and I hope this helps. --W/D--

Feb 09, 2011 | Amana Air Conditioners

2 Answers

Outdoor fan does not come on


most likely it the the cap that is bad. Is this in heating or cooling mode?

Jun 03, 2010 | Air Conditioners

2 Answers

Airconditioner wont come on


Does the indoor blower come on? If not you might have a low voltage problem in your thermostat circuit or blown breaker or fuse for your furnace which energizes the contactor outdoors. If indoor blower runs check if their are any fuses in your outdoor disconnect.

Apr 30, 2009 | Air Conditioners

3 Answers

Problem with my AC unit


Hi Phillip,

Check your thermostat wires to see if you have any of them which are bare and touching. If any are touching separate them and tape em up and try unit again. You have a direst short in your cooling portion of the unit.

Feb 12, 2009 | Ruud UAMB Air Conditioner

1 Answer

High Pressure cutoff


YOUR OUTDOOR FAN MOTOR SHOULD NEVER SHUT OFF IN THE AC MODE. IT IS SUPPOSED TO SHUT OFF IN THE HEAT MODE WHEN ITS IN DEFROST. IF THE UNIT IS RUNNING IN COOL AND THE OUTSIDE MOTOR QUITS ,THE COMPRESSOR WILL QUIT SOON AFTER. EITHER THE RUN CAPACITOR FOR THE FAN IS BAD OR THE FAN MOTOR ITSELF IS BAD, IF CAP IS GOOD THEN THE MOTOR IS At FAULT. THE OUTDOOR PRESSURE SWITCH CAN ALSO OPEN IF THE INDOOR FAN MOTOR FAILS IN HEAT OR THE FILTER IS PLUM NASTY in heat OR THE INDOOR COIL IS PLUGGED UP in heat.. THE PRESSURE SWITCH USUALLY TRIPS AT 400 TO 425 SO ITS WORKING CORRECTLY. YOU MAY BE CONFUSING THE ISSUE SAYING THAT THE AIR IS HOT AND COLD INSIDE. IT IS COLD WHEN AC IS RUNNING HOT WHEN HEAT PUMP IS RUNNING IN HEAT BUT ESSENTIALLY not cold or hot if compressor isn't running, but a lot of folks describe the lack of cold air as hot when the compressor isnt running. but it basically is warm or house air temp.you test the capacitor with a capacitor tester or take it to motor shop and let them test it. odds are its a 5 , 7.5 or a 10. it should test within 10 % of rated value . ask for a RESCUE brand replacement motor. they are great ,reversable etc.carefully oil and sand the motor shaft and note exactly where the blade was located in relation to the grill so you get it back just the same. usually they wire up black to a leg of 220 power. white to the other leg of 220 power. brown and brown with white stripe to the capacitor.you can also pull whole fan shroud assembly on some units and take whole thing to motor shop and let them test motor cap, replace and all you do is return to unit and connect two power leads,

Oct 26, 2008 | Air Conditioners

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