I have the Rheem Imperial 80 plus gas furnace, my trouble is my burners run for 5 to 7 seconds then goes out. I have replaced the filter, removed the air filter, I have replaced the flame sensor, sucked on the pressure switch hose and can hear it pop and release. The entire furnace is as clean as you can get it. Motor is running fine, wires are all connected, and no damage. Brand new self igniter, do you guys think it could be my pressure switch??? Help, I live in MN. and I'm running 3 space heaters today, I'll be going to a plumbing & heating shop in the morning, 30 miles away. Thanks for any response....
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flame goes out, Help