McDonnell & Miller 94-HD Pump Controller Refrigerant this SPST (Single Pole Single
Platform notes & fabric story
Description
McDonnell & Miller 94 HD Pump Controller Refrigerant this SPST (Single Pole Single this SPST (Single Pole Single Throw) mechanical switch monitors differential air pressure to verify proper blower operation and venting before allowing the combustion cycle to proceed Premature failure is often caused by excessive moisture in the heat exchanger