In the closet is a dual HVAC set:

On top Refrigerant Evaporator

Model BV134 36+X2 BNS25

Below Furnace with blower:

Model G24M3-75A-11

Surelight PCB Model 24L8501

Outside compressor unit:

M/N HS27-030-1P

White/Rodgers Comverge Thermostat:

1F88-275

Symptoms:

AC doesn't run.

Thermostat is set to cool at 72 degrees.

Indicated temperature is 82 degrees.

"Power Fail" is flashing in the upper left.

I can turn the blower fan to on, and it works until I turn it off.

When I check the HVAC in the closet, the LEDs on the SureLight board are not flashing. The 2amp circuit breaker above the board is flipped off.

When I reset the circuit breaker:

The two LEDs flash slowly together, starting immediately.

At about 3 seconds, the combustion air blower motor starts and runs for less than two seconds.

The thermostat "power fail" indication goes away, and the set temperature starts to flash.

At five minutes even, the LEDs stay on together for about 2-3 seconds. (times are consistent across 4 tests)

The circuit breaker then trips and the lights go out.

Inside, the thermostat shows "power fail"

There are no indications throughout this period at the outside compressor.