Goodman P/N B1370133 – Genuine OEM Furnace Pressure Switch (Single Stage, -0.35" WC, Normally Open)

The Goodman B1370133 is a Genuine Original Equipment Manufacturer (OEM) furnace pressure switch, designed for use in Goodman, Amana, and Janitrol residential gas furnaces. This single-stage, negative pressure-activated switch is a vital safety component, engineered to monitor the draft created by the induced draft motor and prove that the furnace venting system is clear before allowing the main gas valve to open and ignite the burners.

As an authentic OEM component from Goodman, the B1370133 ensures precise set-point calibration (-0.35 inches of water column, " WC) required by the control board. It features a durable yellow plastic construction, a single-port 1/4" barb connection (Normally Open contacts), and specific mounting hardware for a seamless, secure installation. Choosing the original factory part prevents nuisance "pressure switch lockout" errors and maintains the furnace's critical safety certifications.

Key Features and Function:

• Safety Interlock: Proves successful venting operation to the control board before ignition can occur.
• Genuine OEM Reliability: Official Goodman replacement built to factory standards for exact fitment and calibration.
• Precise Calibration: Factory-set to -0.35" WC for reliable operation specific to compatible furnace designs.
• Single Stage Design: Simple, robust design (SPST, Normally Open) for use in standard single-stage heating systems.

Product Details and Key Specifications:

• Part Number: B1370133
• SKU: B1370133
• Manufacturer: Goodman (Daikin/Amana)
• Part Type: Pressure Switch (Single Stage, Negative Pressure)
• Switch Type: SPST (Single Pole, Single Throw), Normally Open contacts
• Set Point: -0.35 inches of Water Column (" WC)
• Connections: Single Port, 1/4" barb fitting
• Material: Plastic, Yellow
• Control Voltage: 24 VAC

🛠️ HVAC Depot Pro Tip: Troubleshooting the Pressure Switch Circuit

If your furnace is running the inducer motor but immediately locks out (flashing the pressure switch fault code), the issue isn't always the B1370133 switch itself. First, check the rubber tubing connecting the switch to the inducer motor for cracks, blockages, or water accumulation. Second, ensure the furnace's intake and exhaust vents outside are clear of snow, ice, or debris. Only after verifying these common issues should you test the switch with a manometer to confirm it is pulling exactly -0.35" WC and closing the circuit.

Cross-Reference:

The B1370133 is a direct OEM replacement for the following part numbers:

• OEM & Catalog Numbers: B1370133, B13701-33, P272805, B1370138.
• Manufacturer Cross: MPL 9300-V-0.35-N/O-VS.

Extensive Model Compatibility List:

Note: Use 'CTRL+F' to search for your specific model:

• Goodman/Amana Furnaces (Specific Models):
• GDPI120-5, GDPS120-5, GDPX120-5B, GMP050-32, GMP075-3
• GMP075-32, GMP075-4, GMPE075-3, GMPE075-3A, GMPH075-4
• GMPV075-1.5, GMPV075-3, GPD075-3, GPG12481151A, GPG12600901A
• GSM080-4, GSMS060-3, GSMS080-4, GSMS100-4, GSU080-4
• GUPI120-5, GUPS120-4, GUPS120-5, GUPS140-5, PGB036075-1B

Pressure Switch, Air, -0.35 in wc, NO, 24 V, Plastic, Yellow

B1370133

• Parts and Accessories
• Pressure Switch, Air, -0.35 in wc Measuring, NO, 24 V, Plastic, Yellow
• Accessory

This item is compatible with the following Goodman-Amana model numbers.

GMPE075-3A/GMPE075-3A
GSU080-4/GSU080-4
GMP075-32C
GDPX120-5B/GDPX120-5B
GSM080-4
GPD075-3
GMPH075-4
GMP075-32
GUPS120-4/GUPS120-4
GMP050-32
GUPS140-5/GUPS140-5
GUPS120-5/GUPS120-5
GMPE075-3
GMP075-4
GMP050-32C
GMP075-3