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When you say the compressor starts for a second then shuts down, I am assuming the contactor is not opening and the compressor is going out on thermal. This combined with the info that you are checking the charge in cooling mode and the only value we know is 8 degrees subcooling makes me wonder if the system may not be charged correctly.

You stated there is no TXV so when you are checking pressures in cooling mode we need to know superheat, however, the more accurate method to check the charge would be to look at the manufacturer winter charging chart which should be with the unit unless the installer didn't leave it there.

I have seen reversing valves shift with no noise, and, keep in mind refrigerant flow is what causes it to shift, so the unit must be running for the shift to take place.

If the compressor is out on thermal it may take several hours to cool enough to start

Good luck

Hahahaha...This thread just keeps getting better.

With how the OP described the problem I would never have been able to diagnose it.

A reversing valve needs a differential pressure to shift. If you can't make this happen it won't shift.

Glad you figured it out.

Also, hope it's not low on charge when it's time for cooling.

Originally Posted by hands

I wouldn't think the board was the problem if the contactor was pulled in and the fan and compressor were not running. Sounds like the capactor might be going bad.

Sounds like he needs to sit down with his boss and go over diagnostic skills.

Originally Posted by jeffrey43

Contactor pulls in compressor kicks on for a second fan does not come on at all then it all shuts down.

I wouldn't think the board was the problem if the contactor was pulled in and the fan and compressor were not running. Sounds like the capactor might be going bad.

Originally Posted by jeffrey43

Its a GSZ1302416A Goodman Heat Pump I installed on Augest 29th of this year. The HO has been running this thing in heat mode only for the last 2 and a half months. They call last week and say its not working.

Okay. So this is a residential install.

Riddle me this, Batman.

Why is this post in the Tech to Tech COMMERCIAL forum???

Originally Posted by jeffrey43

Just to let you all know I did all the checks and balances and it wound up being the circuit board. I guess it was intermitent and screwed the pooch when it decided it wanted to. HO is pleased because it was under warranty, I am pleased because it is over. I have little expeirience with circuit boards and some of us are still learning. So for those of you that want to act like they know it all, you dont and nobody does!

I'm sorry, I must have missed a post where someone was "acting like they know it all."

1) keep learning

2) improve your attitude

I suspected the internal time delay on the board, but you need to verify power coming to the board thru the Y wire, and then verify the Y power leaving the board and going thru the pressure switches to the contacter. That would have showed the problem was the board. As you work with these units, it will come easier. Just working on a few of them over time will make you feel less intimidated. Take the time (when you have it) to play with a few things in the controls, and see how they react. At the very most, you may blow a control fuse, but you'll gain an understanding of what the different components do, and how the equipment acts when they don't do what they're supposed to. Make sense???

Jeffrey,

Great to hear that you found the problem!

Learning. That's what this site is for. I learn something new on here almost daily. Example: Rundawg schooled me on a timed defrost issue just a few days ago.

From what I read, I don't think anyone was acting as if they "know it all" and I certainly hope that I wasn't the one who came off like this.

We are just a group of guys who are passionate about HVAC and volunteer their time in an attempt to help out/receive help from others. We can only help others if the correct information is relied to us. I hope you didn't get discouraged by my comments or someone else's because we need guys like you around here!

Good luck!

Just to let you all know I did all the checks and balances and it wound up being the circuit board. I guess it was intermitent and screwed the pooch when it decided it wanted to. HO is pleased because it was under warranty, I am pleased because it is over. I have little expeirience with circuit boards and some of us are still learning. So for those of you that want to act like they know it all, you dont and nobody does!

Ok. This thread has me all messed up. The OP hasn't communicated the issue well. It first sounded like a RV issue now it's sounds like a control wiring issue.

To the OP, HVAC 101. Check all the basics. Test low voltage. Confirm low voltage in correct areas. Confirm high voltage in correct areas. Ohm out all pressure switches and sensors. Connect your gauges when you first arrive and don't take them off the system until your finished.

Once you do this, coupled with advice already given; The problem should become pretty apparent.

Originally Posted by SBKold

Something wrong with controls. Possibly the board.

Pressure switch on discharge line between RV?

If you have it in cooling mode the cond. fan should come on with the compressor. I always take the time delay out of the stat since the board has a time delay

Something wrong with controls. Possibly the board.

Contactor pulls in compressor kicks on for a second fan does not come on at all then it all shuts down.

When you say it doesn't come on does that mean the contactor is closing and fan runs but compressor is out on ol?.

Or is the unit not doing anything?

After you waited ten minutes for unit to come back on, did you check to see if you had 24v on "y"? Is it possible the thermostat has a built in time delay and the condenser has a time delay. I have found this sometimes and the wait can be longer than ten minutes. I would start with the basics on this.

1) figure out what time delays you have
2) verify low voltage call for heat/cool
3) check charge
4) verify reversing valve operation

It does sound like you have a bad reversing valve, but that isn't what is keeping unit from coming on.

Sounds like the rev valve is fubar. When you get it running don't shut it off keep engaging the rev valve over and over to see if it finally switches. If it doesn't, get your pressure diff as great as you can, cardboard over condenser and try rev valve again, if you don't hear it change but only a click I am only guessing that where your problem is.

Its a GSZ1302416A Goodman Heat Pump I installed on Augest 29th of this year. The HO has been running this thing in heat mode only for the last 2 and a half months. They call last week and say its not working. I go and find that the compressor starts for a quick second then shuts down. I then put it in cooling mode and while its running I remove orange wire from circuit board and 4 way valve disengages so I determine the valve and solenoid are good. I block up the condensor in cooling mode to simulate a 90 degree day it was 58 degrees that day and check the charge I determine its over charged and no I dont remember the values except I had it condensing at 120 degrees and I had a subcooling of about 20 degrees, I removed 1/2 a pound of refrigerant R-410A. It was then condensing at 110 with a subcooling at about 8 degrees I think. I shut the unit off and let the pressures egualize. I turn it to heat mode and it starts right up after time delay. I let it run for 15 min. shut it off and restart it 4 times. It was working good and heating the home good as well.

Then they call today same problem but the outside ambient was at least 15 deg colder. I fire it up in cooling mode again and go to check the 4way valve again pull orange wire and nothing, does not disengage just clicked. I wait 10 min for it to come back on and it wont ???? Now I am feeling really stupid and tell HO have to call tech support. I am going back tomorrow or actually today to see if I can get this damb thing to run. I installed 4 of these this year and all the others are doing fine I have got to be missing something or this thing is just possessed. I am learning that I need to start writting everything down.

I agree with timebuilder there is no information to help trouble shoot this problem

Originally Posted by timebuilder

This is a so called "teachable moment" for many young techs.

Some snicker under their breath when I harp on communication skills, but those skills are KEY when describing a sequence of events for a customer, a service manager, or a bunch of strangers on an HVAC site.

You need to be able to describe all of the steps, actions, observations, and your reactions, IN ORDER, so we can follow the events and your thinking, in order to find what you may have overlooked, and to help you understand what is actually going on.

I want to know things like amp draw on startup. What kind of start components? For those of us who did not read the other thread: model and serial??

Information is everything in diagnostics.

PREACH, BROTHER!

Originally Posted by SBKold

You tap on the valve to make if shift?

Don't tell'em to do that unless your confident they are capable.