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i just replaced my compressor and it doent seem to be pumping. after breaking vacuum with vapor until the lp switch acttivates. i start up and both high and low press. rise about 5 psi? this is the 2nd compressor i assumed the first was bad i have checked the oriface, purged with nitrogen please help?

Submitted: 147 days and 12 hours ago.

Category: HVAC

Value: $15

Status: AWAITING CUSTOMER ACTION

Posted by Kenton Guidry 147 days and 12 hours ago.

Info Request

How much refrigerant do you have in the system?

147 days and 12 hours ago.

Reply

both high and low side seem equalized at 105 psi and both rise on start up about 5 psi

Posted by Kenton Guidry 147 days and 12 hours ago.

Info Request

This question may be silly, but do you have your gauges open from the high and low sides?

147 days and 12 hours ago.

Reply

both gauges are shut /service valves are open i did try to close high side service valve to see if press would increase but nothing

Posted by Kenton Guidry 147 days and 12 hours ago.

Info Request

Are you certain that the compressor is running?

How many amps does it pull?

When you closed the high side, what did your pressures read?

147 days and 12 hours ago.

Reply

im woring with the fan disconnected so i hear it running but also i checked amp draw and changed run cap

Posted by Kenton Guidry 147 days and 11 hours ago.

Info Request

How many amps is the compressor drawing?

147 days and 11 hours ago.

Reply

about 25 at start up then runs at about 6 its a 2 ton heat pump (goodman)

Posted by Kenton Guidry 147 days and 11 hours ago.

Answer

This is what I would do.

Connect your condenser fan back up.

Run the system and see what your pressures are doing.

147 days and 11 hours ago.

Reply

ill give it a try but i dont expect a difference

Posted by Kenton Guidry 147 days and 11 hours ago.

Answer

Let me know what your pressures read when you do this.

147 days and 11 hours ago.

Reply

same thing both sides rise about 5-7 psi

147 days and 11 hours ago.

Reply

same thing both sides rise about 5-7 psi 105 go to 110 low high side 125 to 130

Posted by Kenton Guidry 147 days and 11 hours ago.

Info Request

Is this a heat pump?

147 days and 11 hours ago.

Reply

yes im sorry i thought i mentioned that its been a long week

Posted by Kenton Guidry 147 days and 11 hours ago.

Answer

Now I understand.

Your system is either running in the heat mode, or your reversing valve is bad.

147 days and 11 hours ago.

Reply

i suspected this i disconnected the power to the solenoid and i hear it clicking it there anyway to check the rv? the system has the same conditions with or without power on the solenoid. I have tried tapping it with the back of a screwdriver. i assumed if it were to fail the compressor would still pump?

Posted by Kenton Guidry 147 days and 10 hours ago.

Answer

Sounds like that reversing valve is stuck.

You will have to change it out.

Your compressor is still good.

147 days and 10 hours ago.

Reply

ya gotta help me out I dont understand how it can fail withou my pressures rising?

Posted by Kenton Guidry 147 days and 10 hours ago.

Answer

The pressures you are reading are correct.

Your reversing valve is stuck and will not move.

This is causing your system to run in the heat pump mode.

Your compressor is running and pumping refrigerant.

147 days and 10 hours ago.

Reply

i was reading up on replacing is it really as difficult as they say? my brazing skills are pretty decent

Accepted Answer

Its not a hard install.

Since you replaced the compressor, I bet you can do it.

Accepts:
Expert:	Kenton Guidry
Pos. Feedback:	98.8 %
Answered:	6/27/2009

HVAC Technician

EPA issued refrigeration license, College certificate, and 7 years in field.

147 days and 10 hours ago.

Reply

Thanks Kenton

Posted by Kenton Guidry 147 days and 6 hours ago.

Info Request

You are very welcome.

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HVAC

Have your own HVAC question?

Question

Info Request

How much refrigerant do you have in the system?

Reply

both high and low side seem equalized at 105 psi and both rise on start up about 5 psi

Info Request

This question may be silly, but do you have your gauges open from the high and low sides?

Reply

both gauges are shut /service valves are open i did try to close high side service valve to see if press would increase but nothing

Info Request

Are you certain that the compressor is running? How many amps does it pull? When you closed the high side, what did your pressures read?

Reply

im woring with the fan disconnected so i hear it running but also i checked amp draw and changed run cap

Info Request

How many amps is the compressor drawing?

Reply

about 25 at start up then runs at about 6 its a 2 ton heat pump (goodman)

Answer

This is what I would do. Connect your condenser fan back up. Run the system and see what your pressures are doing.

Reply

ill give it a try but i dont expect a difference

Answer

Let me know what your pressures read when you do this.

Reply

same thing both sides rise about 5-7 psi

Reply

same thing both sides rise about 5-7 psi 105 go to 110 low high side 125 to 130

Info Request

Is this a heat pump?

Reply

yes im sorry i thought i mentioned that its been a long week

Answer

Now I understand. Your system is either running in the heat mode, or your reversing valve is bad.

Reply

Answer

Sounds like that reversing valve is stuck. You will have to change it out. Your compressor is still good.

Reply

ya gotta help me out I dont understand how it can fail withou my pressures rising?

Answer

The pressures you are reading are correct. Your reversing valve is stuck and will not move. This is causing your system to run in the heat pump mode. Your compressor is running and pumping refrigerant.

Reply

i was reading up on replacing is it really as difficult as they say? my brazing skills are pretty decent

Accepted Answer

Its not a hard install. Since you replaced the compressor, I bet you can do it.

Reply

Thanks Kenton

Info Request

You are very welcome.

Related HVAC Questions

Are you certain that the compressor is running?

How many amps does it pull?

When you closed the high side, what did your pressures read?

This is what I would do.

Connect your condenser fan back up.

Run the system and see what your pressures are doing.

Now I understand.

Your system is either running in the heat mode, or your reversing valve is bad.

Sounds like that reversing valve is stuck.

You will have to change it out.

Your compressor is still good.

The pressures you are reading are correct.

Your reversing valve is stuck and will not move.

This is causing your system to run in the heat pump mode.

Your compressor is running and pumping refrigerant.

Its not a hard install.

Since you replaced the compressor, I bet you can do it.