Goodman heat pump very fast cycling

[tkolarik]

I have a Goodman model CPRT36-T heat pump system that I just noticed is cycling very fast. The system runs and cools or heats, but I can hear a noise from the oustide unit and the lights dim slightly approximately every 10 or15 seconds.

I left the unit off for 12 hours and it continues to have the same problem. Have not made any changes or service in 9 months.

Please help....
Thanks!

[paul52446m]

I have a Goodman model CPRT36-T heat pump system that I just noticed is cycling very fast. The system runs and cools or heats, but I can hear a noise from the oustide unit and the lights dim slightly approximately every 10 or15 seconds.

I left the unit off for 12 hours and it continues to have the same problem. Have not made any changes or service in 9 months.

Please help....
Thanks!

There are a lot of things that can cause this problem. Sounds like you are over amping when it try's to start. Just to mention a few things, Burned wires because of a bad points in a start relay in the condenser. Revising valve not opining causing it to go to hi head pressure real fast. Start capacitors bad.
Valve stuck in compressor. Line or low volt power being low. I guess the first thing i would do is check voltages, and amperage. Inspect all wires and wire connection. Then you would have to check start capacitor and put gages on unit. So you are limited to how far you can go in checking your unit out. Most likely have to call a tech. You do not want to run it like it is or you might damage it a lot more. Paul

[tkolarik]

Thanks for the quick reply!

Where would I get the specs for the voltages and amperages? I guess just a good overall inspection might be the limit of my abilities.

[paul52446m]

Thanks for the quick reply!

Where would I get the specs for the voltages and amperages? I guess just a good overall inspection might be the limit of my abilities.

The name plate should have all the info on it. Should be 220 to 240 volts and run amps 12 to 15 per leg. start amps should last for a few seconds at 24 to 30 amps. The low volt at the relay should be not less then 24 volts. Like i said check for burned wires and dirty points in a relay. Burned wires by the relay could be bad points in the relay. If relay snaps good and you don't get voltage drop across the contacts then it could be the start capacitor as they showed you in the other forum. If the cap. is bad it will draw hi amps. Paul

[tkolarik]

Thanks everyone for the help, but the technician checked it today and said it is the compressor.

Weird thing with Goodman, the manufacturer.... the tech called his office and they called Goodman and they said the unit was out of warranty based on the serial which starts yymm. My serial is 0602, and the paperwork says, when in doubt about the installation date, "the warranty period starts three months AFTER the manufacture date"

They tried to disallow my coil warranty repair last year even though I had documentation and a paid credit card receipt! Not to mention that the replacement coil came to my home DEFECTIVE, and had to call the techs out a week later to repair a defective schrader valve. I took weeks, threats and I had to sign a disclaimer to get the money back for the techs time to repair there defective coil!

[Tdad]

That's one of reasons why Goodman is normally cheaper than other brands such as Trane, Lennox, or Rheem: quality and service are not so good.

[tkolarik]

Hey, the technician came by today to replace the compressor under the warranty and after 6 hours, he came to me to get paid and explain...

The compressor was bad and they replaced it but also it appears that something else is bad and maybe the reversing valve. It would cost another $1000 to replace it under warranty.

SHOULD THEY HAVE BEEN ABLE DETERMINE THAT BEFORE REPLACING THE COMPRESSOR!

[paul52446m]

Hey, the technician came by today to replace the compressor under the warranty and after 6 hours, he came to me to get paid and explain...

The compressor was bad and they replaced it but also it appears that something else is bad and maybe the reversing valve. It would cost another $1000 to replace it under warranty.

SHOULD THEY HAVE BEEN ABLE DETERMINE THAT BEFORE REPLACING THE COMPRESSOR!

I think you said the old compressor was still running and making a noise. They should have been able to check that reversing valve before the started. I don't how much the reversing valves are but it sounds like you are getting riped off.
I have been in the heating field for over 40 years. I have no use for heat pumps. I don't think they are worth the money you put into them for what you get out of them.
One main problem we have is, your government said we had to come up with new refrigerant, so we got 410A. Well guess what, the industry does not have reversing and stop valves that are made to take 400 to 500 lbs pressure.
And its not just Goodman, all co. have this problem. I sell mostly Goodman
95% gas furnaces, and they have life time on heat exchanger, and ten years on all parts. Paul

[TJK]

Need Help To Repair Goodman Heat Pump

I would appreciate if anyone is able to help me with a problem I am having with my heat pump.

The heat pump is a Goodman, model #CPKE42-1B.

About a week ago, the compressor and fan stopped working. So I took off that electrical cover where the capacitor and circuit board is located. I held in that black button until the compressor and fan kept running. Cool air was coming out of the vents while in the heat mode. I then turned the temp. down to shut down the heat pump. Then I turned the temp back up to see if the compressor and fan would come back on but it would not unless I held that black button back in for about 30 seconds.

That black button needs to be held in each time to start the compressor and fan! Also after it shuts down, there is a loud hissing coming from the inside of the heat pump!

I don’t know if this has anything to do with the heat pump not working, but the same day it stopped working properly, I had new shingles placed on my roof from hail damage. Well, one of the roofer’s foot and leg fell through the tar paper where the vent was to be reinstalled. It just so happens his foot smashed into the group of Romex wiring going to the breaker box. I didn’t think anything of it until a few days after they were done installing the new shingles. I crawled into the crawl space through a small door in the closet ceiling. I looked at the group of about 15 wires and can see where the foot marks hit three of the wires but no copper was showing. Also, that same day the foreman used one of those combs to straighten the fins on the heat pump and also spray painted the fins black.

I cannot see that either of the two incidents could cause the heat pump to stop working properly, but it is sure a coincidence it broke down the same day???

Anyway, I would sure appreciate any suggestions or recommendations to help me repair the heat pump. I actually cannot afford to have a repair person come out here. I am somewhat mechanically inclined, so if there is something that might need to be replaced or checked out, hopefully I can do it if I had someone with knowledge guide me through the steps to repair it myself.

Thank you in advance.

Tom
TK@Commspeed.Net

[hvactech126]

sounds low on refrigerant and having to hold the contactor in is bringing up the pressure to engage the pressure switch. Going to have to call a tech out!