Amana-Goodman B1370208 Pressure Switch

The Amana-Goodman B1370208 Pressure Switch is a critical safety component designed for induced draft blower assemblies in high-efficiency gas furnaces. Operating as a single-pole, single-throw (SPST) normally open switch, it monitors the venturi pressure across the combustion blower to ensure the heat exchanger is properly vented before allowing the ignition sequence to proceed. With a factory-calibrated set point of -0.70" WC (Water Column), this replacement part is essential for resolving furnace pressure switch lockout codes and ensuring reliable draft inducer motor performance. This genuine OEM part ensures precise differential pressure sensing and maintains compliance with the original equipment manufacturer’s safety protocols. When installing the B1370208, contractors should inspect the pressure switch tubing for cracks or moisture and verify the inducer fan is pulling the required negative pressure. Using a manometer to confirm vacuum levels ensures this HVAC replacement part functions within tight tolerances to prevent nuisance tripping and premature system shutdowns.

• OEM Reliability: Direct Goodman replacement part ensures exact fitment and terminal alignment without modifications.
• Safety Sequence: Prevents gas valve activation if venting is obstructed or the inducer fails to reach proper RPM.
• Durable Construction: Engineered to withstand high temperatures and vibration common in HVAC air handlers and furnace cabinets.
• Precise Calibration: Rated at -.70" PF to meet strict combustion safety requirements for condensing gas furnaces.

Common Contractor Questions

What causes a B1370208 pressure switch to stay open?
An open circuit typically indicates a failing inducer motor, a clogged vent pipe, a cracked heat exchanger, or a restricted condensate drain line. Always verify the actual pressure with a digital manometer before replacing the switch.

Can I use a universal pressure switch instead of the B1370208?
While universal switches exist, they often require manual calibration. Using the B1370208 OEM switch ensures the -0.70" WC set point is exact, maintaining the unit's UL listing and safety margins.

How do I troubleshoot high-limit or pressure switch codes?
Check for blocked vent terminations or internal debris within the inducer housing. If the vacuum load is correct but the switch does not close continuity, the internal diaphragm or contacts have likely failed.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.