http://www.askmehelpdesk.com/heatin...-furnace-still-flashing-3-flashes-601743.html
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.
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.
