Goodman B1370176 Air Pressure Switch -0.60" WC OEM Furnace Safety Replacement

          The Goodman B1370176 is a vital safety component that acts as the "brain" for the combustion air verification process. This genuine OEM pressure switch is designed to monitor the negative pressure created by the draft inducer motor, ensuring that flue gases are safely being exhausted before allowing the ignition sequence to proceed. It is specifically engineered for the GMS8, GMS9, GDS8, and GDS9 furnace series. By verifying that the venting system is clear and the inducer is operating at peak performance, this switch prevents the furnace from operating under hazardous conditions, such as a blocked flue or a failing blower.

Key Features

• Genuine OEM Part Number B1370176: This is a factory-certified replacement, ensuring that the trip point matches the original safety calibration of your Goodman or Amana furnace.
• Precise Pressure Calibration: Set to a specific -0.60" WC (Water Column) rating, this switch provides the exact sensitivity required to prove the draft without causing nuisance trips.
• Solves "No Heat" and Relay Errors: Replaces aging or "stuck" switches that cause the furnace to stay in a pre-purge loop or trigger a "pressure switch stuck open/closed" fault code.
• Advanced Safety Monitoring: Continuously monitors the vacuum pressure throughout the heating cycle, immediately shutting down the gas valve if a venting obstruction is detected.
• High-Durability Diaphragm: Constructed with premium materials to resist the heat and moisture found in the burner compartment, ensuring long-term reliability compared to universal "adjustable" switches.

Product Details

• Brand: Goodman / Amana
• Manufacturer: Goodman Manufacturing
• Part #: B1370176
• UPC/SKU: 662766113940 / B1370176
• Shipping Weight: 1lb
• Voltage: 24 VAC (Control Circuit)
• Pressure Set Point: -0.60" WC
• Switch Type: Normally Open (Closes on pressure rise)
• Connector Type: 1/4" Male Quick Connect Terminals
• Application: Induced Draft Safety Verification

🛠️ HVAC Depot Pro Tip

"Check the Hose and Port First"—before condemning the B1370176, inspect the small rubber vacuum hose connecting the switch to the inducer housing. Even a tiny crack or a bit of debris inside the plastic port on the inducer can prevent the switch from "seeing" the vacuum. Use a small paperclip to gently clear the inducer port of any rust or spider webs. If you install the new switch and the furnace still won't fire, verify that your inducer motor is reaching full speed and that your vent pipe isn't blocked by ice or a bird's nest.

Cross-Reference

• Superseded / Legacy Numbers:

  B13701-76, B1370176S, 20197712, 107342-05

• Equivalent Numbers:

  MPL-9300-V-0.60-DEACT, IS20352-5107

• White-Rodgers / Emerson Equivalents:

  70-20602-01 (Logic Series)

Model Compatibility

• GMS8 (Suffixes: 0453ANA, 0703ANA, 0704BNA, 0904BNA, 0905CNA, 1155CNA)
• GMS9 (Suffixes: 0453BXA, 0703BXA, 0904CXA, 1155DXA)
• GDS8 (Suffixes: 0453ANA, 0703ANA, 0904BNA, 1155CNA)
• GHS8 (Suffixes: 0453ANA, 0703ANA)
• DMS9 (Suffixes: 0453BXA, 0703BXA, 0904CXA, 1155DXA)
• DDS8 (Suffixes: 0453AXA, 0703AXA, 0904BXA, 1155CXA)
• GCH9 (Suffixes: 0453BXA, 0703BXA, 0904CXA)