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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a weathermaker 9300TS 58mta 100 that continues to

Customer Question

Hi. I have a weathermaker 9300TS 58mta 100 that continues to cycle and not heat
Submitted: 1 year ago.
Category: HVAC
Expert:  gotoman for ac replied 1 year ago.

If furnace is firing. There is a flame sensing rod located in next to last burner. Remove and clean sensor. Clean sensor with sand paper or steel wool. These sensors get corroded over time and will not sense flame. Also check the flashing LED and count flashes. This will tell us the problem area. Russ

Customer: replied 1 year ago.
I will clean rod shortly. After turning power back on I get a code 12, then after cycling I get a 32 and 33. I have seen a code 22 as well.
Customer: replied 1 year ago.
Cleaned rod, thought it was working better, but not blowing real hot. Still have a code 31.
Customer: replied 1 year ago.
Trap clogged. Cleaned and everything seems to be working.
Expert:  gotoman for ac replied 1 year ago.

31 is blocked vent,bad pressure switch. Take the hoses off the ends of the air switch clean the small opening in switch and induce draft assembly with paper clip. Make sure hose are clean. Russ