Goodman package unit pgb036075-1 issues. No light on control board

The 3 amp fuse blowing indicates some control function is either grounding out (probably a worn insulation on control wire) or one or more of the solenoid controls is pulling more wattage than it is designed to draw. The solenoids for the main contactor and reversing valves should only draw about 0.1 to 0.25 amp. Any more than this the solenoid overheats and causes the control fuse to blow. I have actually had to replace the thermostat wire on some units because the control that was pulling more than designed caused the entire length of thermostat wire to overheat and break down the insulation, causing the control wire to short to the common wire or others and cause more than required operations to occur simultaniosly. One unit had a short and emergy heat was coming on the same time cooling was on.

There should be a code chart on the inside of the control panel.

check your themostat fan mode switch to see if it in on or auto. It should be in auto. If this does not stop indoor fan motor, (it may take up to 2 minutes for the fan to stop, preprogrammed shutoff in the thermostat and fan control cards may make you think the fan has not stopped ) If this does not stop the fan the fan control board in your air handler has a green wire shorting to 24 volt signal in the theromostat wire or the contact on the blower control card is stuck and will need replaced.

the fuse is located in the circuit board in the blower compartment and the roll-out is located in the burner section and can be a reset-able switch style or the one time fuse link style which is a a small silver cylinder and is mounted in a ceramic piece and is held in with one screw. Both of these are mounted around the opening of the your burner assembly near the opening. This will be near the area of the gas valve.

You can try the 4 amp fuse thats on the inside of the unit, on the board, if you feel confident that there is 120v going to the unit. Having issues with the board can be a bad sign and not knowing what they have already done to it kinda leaves me in the dark, but you can try that and if the fuse blows again, you have other problems going on that they will have to trouble-shoot. The unit is still under the 5 year warranty so it might be best to try and get another board all together, you should only have to pay labor cost. It could be the transformer too, you can check it with a meter to see if your getting the 120v going in and 24v going out if capable. Hope this helps some and good luck!

I would check and make sure there is proper voltage to the unit before I replaced the circuit board but yes they are referring to the circuit board.

There should be one packaged with the unit. Shut off the power and open the metal enclosure around the control board.
--W/D--

does that unit run heating or just the fan run? if just the fan you may have a bad fan thermostat

This can only be 1--of 2 things, (the easy fix first, transformer or curcuit board is bad) .If you have 220 volts then check for power going into the transformer, (220 vt) and then power going out, (24-28vt) (90% of the time, its the transformer, 10% of the time, its the cuircuit board.! , i