Hello and thanks for your time,
The gas would burn for about a minute and kick out.
I had many things ruled out: flame sensor, circuit board, broken inducer fan, adequate draining, etc.
Nothing worked until I removed one of the two tubes from the pressure switch. The gas furnace now runs perfectly: calls for heat, it runs until temp is reached, then gas shuts off, the fan stays on. All good. ( I think?)
This is a single stage - condensate pressure switch. The voltage and resistance were good. The orange tube is still in, but the black tube was removed. Is this safe? Do I need this tube on? When the black tube is connected, the gas will shut off in about 30 seconds to a minute.
K
The gas would burn for about a minute and kick out.
I had many things ruled out: flame sensor, circuit board, broken inducer fan, adequate draining, etc.
Nothing worked until I removed one of the two tubes from the pressure switch. The gas furnace now runs perfectly: calls for heat, it runs until temp is reached, then gas shuts off, the fan stays on. All good. ( I think?)
This is a single stage - condensate pressure switch. The voltage and resistance were good. The orange tube is still in, but the black tube was removed. Is this safe? Do I need this tube on? When the black tube is connected, the gas will shut off in about 30 seconds to a minute.
K
source https://hvac-talk.com/vbb/threads/2228321-Pressure-switch-with-one-tube-on-make-furnace-run?goto=newpost
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