Goodman Reversing Valve Default??

You need to check to see if you have 24 volt signal from thermostat to your reversing valve. To go into cooling mode the reversing valve needs to be energized. Orange is normal color of the reversing valve power supply. On your unit will be a reversing valve which looks like a pipe with 3 pipes attached to one side and 1 pipe attached to the other side. On the side of the the reversing valve will be a coil with a 2 wire connection. This coil needs 24 volts applied to shift unit into cooling mode. In your thermostat wire bundle where it is connected, check for voltage between common and the orange wire. If it does not have 24 volts with the thermostat in cooling mode, you have a break in the line normally a connection on the orange junction inside your air handler or your thermostat orange wire is loose. Keep checking for 24 volts available until you find the source of the loss. If you have 24 volts at the reversing valve, you can check to see if the valve is working by unplugging the 2wire connection on the side of the valve, if it clicks its powered if not and 24 volts available then the coil needs replaced.
Any more than this you will need a professional tech to troubleshoot and fix.
Hope this helps.

On Rudd heat pumps the heat position is not the default position for the reversing valve. It either has to be powered to be in the heat position or have gotten stuck in that position. If there is a voltage going to that unit when you are not calling for heat then the mechanism sending it the relay voltage is at fault. A messed up thermostat could be the culprit if it sends out the heat signal to the revering valve when it is not supposed to.

On a Rheem the reversing valve engages on heat. On a Goodman (and most others) the Reversing valve engages on cool. You will want the thermostat to engage the reversing valve on the orange. There may be a switch in the thermostat that allows you to chose either O or B. Select O. If you have a choice of wire on the thermostat of either O or B than choose O. Also check and make sure the thermostat wire goes to the outside unit. Also make sure you have a thermostat that is comparable with your heat pump.

The reversing valve may be stuck. It allows the unit to switch between heating and cooling. You may be able to give it a tap but only on one of the ends, not the sides, and only lightly. You could also unplug the reversing valve from the circuit board. Some reversing valves are energized in heat mode some in A/C mode. When you unplug it, if it shifts, you will hear a loud hiss as the valve shifts and the pressure equalizes.

Most heat pumps are 'fail-safe to heat'. That is: the normal position of the valve which reverses the function is in the position which provides heat. The reversing valve must be powered to switch to the cooling position.

Although the lack of valve function could be a mechanically defective reversing valve - it's more likely to be an electrical issue. Start with checking for power at the reversing valve's coil. If it's powered unpower it - you will be able to hear the reversing valve distinctively

You should be able to move the reversing valve wire from O terminal, (the changeover relay), on the thermostat to B terminal. I deal mostly with York
which O on the t'stat is normally open and B is normally closed.

Sounds like reversing valve is stuck or metering device or check valve is stuck open. If it is a scroll compressor on 3 phase you may need to reverse 2 motor leads. try tapping reversing valve with rubber mallet when running. This may have done in last compressor by sending discharge gas to suction side.

The reversing valve may be stuck or it has a burnt solenoid coil. Also, check the defrost relay accross the contacts with an ohmmeter and see if it's bad. Goodman heat pumps also trip on high pressure. There's a resettable switch on some units with a red button. However, I think the problem is in the defrost circuit or reversing valve. If your electric heat is on, change the board.

GOODMAN HAS A PROBLEM WITH A FAULTY REVERSING VALVE. THEY IMPORT VALVE FROM CHINA AND ITS NOT GOOD QUALITY, THEY ARE IN PROCESS OF CHANGING VENDOR.

I just had a new unit installed and I am surfing for troubleshooting tips too. My unit is doing the same... cools well heat sucks. my problem has been isolated down to the reversing valve... It is constantly energised which means it is constantly in a/c mode even when kicking on the heat strips... We disconnected a line at the thermostat and it is working well as a heater now. You may want to check yours to see if it is actually kicking over into to heat mode... -rob