emiddleb wrote:
Its quite possible the plugged filter caused the issue. There are various lockouts that come into play if the AC ices up, other issues can cause a lockout that resets after 2 hours. I'd certainly give it a try again before pulling off panels. When I first read this I thought of a bad thermistor wire/sensor which controls the defrost/icing cycle.
FYI, the filter should only be a basic fiberglass-type filter, the cheapest kind. The better filters that are cloth-like restrict the airflow too much and are not recommended by the AC manufacturer. I've read that a high-filter HEPA type can restrict the airflow so much that is causes issues similar to what you describe.
There are many manuals for the AC heat/pump here that might be for your unit and give you some help. Many have troubleshooting flowcharts and other schematics.
Good info; a plugged filter definitely may cause the system to shut down.
The circuit board is under a metal cover in the outside unit. You have to open the access door (hinged on top), then take a screw out of the metal cover to find the board. For whatever reason, my system has the inline fuse in the compressor fan high-speed power wire. It's not even shown on some wiring diagrams.
If you open that outside access door, be careful that it doesn't fall and smack your head. I held my door open with a bungee cord stretched around the back of the coach, but that's kinda flimsy and I never felt safe. I got smacked in the head by a door grate on a KC-135 one time, resulting in a sore head and several stitches.