Comfortmaker RPJ II Pressure Switch
On the back of the old inducer there usually is a restrictor plastic orifice plate. It needs to be installed on the new one or it won't suck properly. They can crack and get damaged but apparently are available. The pressure switch is doing its job as a SAFETY device and monitoring the draft thru the heat exchanger. NEVER EVER tamper with it or you could have a flamerollout/fire/damaged furnace!
"Cut it twice and it is still too short".
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