The green light pulse 3 times at a time, don't know what that means, it doesn't fire up, I switched the gas and power off and on , nothing happened, any ideas??
Could be pressure switch. Large silver disklike item with hoses attached.
Carefully disconnect hoses and blow into them to clear. Some people use a paperclip if really gunked up.
Check for obstructions to air intake and exhaust.
Should be posted in HVAC section for more results.
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