Amana-Goodman B1370159 Pressure Switch

The Amana-Goodman B1370159 Pressure Switch is a critical safety component designed for specific high-efficiency furnace models. This OEM replacement pressure switch features a -1.10" PF (Pressure Fall) set point, ensuring the inducer motor generates sufficient static pressure before allowing the ignition sequence to proceed. Engineered with a Single Pole Single Throw (SPST) normally open configuration, it provides reliable circuit closure under precise vacuum conditions. The unit utilizes a barbed connection for secure pneumatic tubing attachment, minimizing the risk of vacuum leaks that cause intermittent ignition failures or furnace pressure switch lockout codes. This HVAC furnace safety switch is built to withstand the thermal cycling common in residential gas furnaces, maintaining calibration accuracy over extended service lives. When diagnosing furnace not heating issues, verify that the inducer housing and venting are clear, as this Goodman replacement part is calibrated specifically for the 1.10" WC drop required by the manufacturer's control board logic.

Key Benefits for Technicians:

• Precise Calibration: Fixed at -1.10" PF to meet exact OEM airflow safety requirements.
• Durable SPST Contacts: High-quality internal Single Pole Single Throw switch ensures consistent electrical continuity.
• Secure Pneumatic Seal: Integrated barbed connection fits standard 3/16" or 1/4" vacuum tubing to prevent nuisance trips.
• Wide Compatibility: Direct drop-in replacement for various Amana and Goodman furnace models.
• Safety Compliance: Prevents gas valve operation if venting or combustion air is insufficient.

Common Questions:

What causes a B1370159 pressure switch to fail?
Failure is often caused by moisture buildup in the sensing line, a cracked diaphragm, or scorched contacts. Ensure the collector box is draining properly during installation.

Can I use a switch with a different WC rating?
No. Using a switch with a different set point than the -1.10" WC specified can lead to unsafe combustion or constant lockout errors. Always match the OEM specification.

How do I test this switch for continuity?
Using a manometer and a multimeter, verify the SPST contacts close only when the vacuum reaches the -1.10" threshold. Do not blow into the switch, as this can rupture the internal diaphragm.

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.