3 Amp fuse was cooked. I plugged the furnace back in and the light blinks once then four times. What is wrong. Thank you Pete

Red light on furnace blinks once then four times.

I cut through the sheet rock wall and by doing so I cut the wires to the thermostat, which caused them to ground. I unplugged the furnace and found that the 3 amp fuse was blown. I changed the fuse and plugged the furnace back in , and know the red light blinks once and then blinks four times. What is the problem. Thank you

Peter Norrbom

There should be a diagnostics chart on the inside of the blower door or somewhere on the unit. Many brands have many different flash codes for diagnostics. You need to find out exactly what the code being flashed indicates. We can't help without make, model. And serial number of the unit.