I have a older 2004-ish Suburban SF-35 that the gas will not light. I just replaced the main board with a dinosaur board and that fixed the problem of turning on the fan but now it will not blow hot.
I turn up the heat to 90 degrees the furnace fan will run for 30 seconds the light on the board will be green. Then for the 7-15 seconds gas WILL run because I can smell it in the exhaust, the light on the board will go red during the time it is trying to light. I can hear a clicking as if the ignitor is trying to light, but nothing happened.
The cycle tries 3 times and then the fan runs for 90 seconds and shuts down.
I turn up the heat to 90 degrees the furnace fan will run for 30 seconds the light on the board will be green. Then for the 7-15 seconds gas WILL run because I can smell it in the exhaust, the light on the board will go red during the time it is trying to light. I can hear a clicking as if the ignitor is trying to light, but nothing happened.
The cycle tries 3 times and then the fan runs for 90 seconds and shuts down.