I installed a goodman 2 ton heat pump 2 months ago. heat and cool mode works fine but will not go into defrost. installed a new defrost board today still does not work. checked voltage at the condencer and air handler the thermostat wires have at least 24 volts at each wire . what could be the problem? thanks Tim
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If the unit is running in cold weather than there is ice building up on the coils located outside. This is normal in that the unit is running in heat pump mode heating inside and cooling outside, After the unit detects the ice build up it briefly reverses the cycle heating the outside coils melting(defrosting) the ice which you observe as water on the pad.
Turn the power off to the heat pump and get a magnifying glass. There is probably only one board inside the outdoor unit anyway, but look closely through the magnifying glass and you should see a set of tiny needle size pins....maybe two rows of 4 parallel pins. There should be a black plastic jumper across a set of pins corresponding to the defrost length. Near those pins and written on the board there will be something relative to defrost duration. This is why you need the magnifying glass especially if you have any trouble with close up vision.
There is probably not a setting that is adjustable for the intervals between one defrost cycle and the next as they are typically initiated not on elapsed time, but on temperature of the outdoor coil providing input to the board that defrost is necessary.
the fan fill come on with the sequencer (stack switch you call it) it will also come on with the fan relay. on some goodmans the fan relay is the black box on the circuit board. use a jumper to jump red to green, this should bring the fan on sounds like you could have a broken green wire, try using a different wire instead of green
call the install company back out. along with the new heat pump i wouls say they installed a leak. you stated r12 i assume you ment r22 if they installed an r22 unit and didnt change the a coil it might not be their work leaking but the a coil might be. at any rate once you have them fix it i would look for a new service company i would never install an r22 system any more the EPA is phasing it out and the replacment in my opion is beter
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.
That does not sound normal at all, I have a Goodman Heatpump and the Fan on the Evaporator (outside unit) should run as soon as it starts up! The only delay you should be seeing is when the unit starts, the fan in the AHU starts 5 seconds after and runs for about 1.5 minutes after shutdown.
First of all is this unit a heat pump i'm not up on goodman model #'s if it is a heat pump reversing valves do go not a real common problem 1000.00 is excessive i would be inclined to get a 2nd opinion. plastic over the sand could create a condensation mold problem. Good luck. Tom
I'm not sure of the kilowatts. The 10 min on and 5 off is telling me there is to much heat by the thermostat or you house needs more insulation. The new compressor is designed for more efficient run time. The other thing is the unit to big for your house? It should run 10 -15 min when low humidity is in the house. Otherwise longer if its pretty warm inside.