What are the specs for this Pressure Switch?

The correct replacement for Goodman model GMPH050-3 — B1370126 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number GMPH050-3 — B1370126.

Is this pressure switch compatible with Bryant or Payne systems too?

Many Goodman parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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Goodman

OEM Goodman -0.40in NO Pressure Switch for GMPH050-3 — B1370126

Name: OEM Goodman -0.40in NO Pressure Switch for GMPH050-3 — B1370126
Brand: Goodman
SKU: GOODMAN-12019
Price: 26.95 USD
Availability: InStock

SKU: GOODMAN-12019 Brand: Goodman

$26.95 $34.95

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Goodman B1370126 Pressure Switch (-0.40" NO)

The Goodman B1370126 is a genuine OEM draft/air-proving pressure switch for the GMPH050-3 gas furnace. This normally-open switch monitors the negative pressure created by the inducer/draft motor and must close before the ignition sequence begins — proving that combustion gases are venting properly. A faulty switch causes lockouts, no ignition, or short-cycling. The genuine part restores reliable, safe startup.

Specifications

Part Number: B1370126
Setpoint: -0.40 in. w.c.
Configuration: Normally Open (NO), closes on negative pressure
Type: Single-pole draft / air-proving switch
Connection: Single hose port, spade terminals
Fits: Goodman GMPH050-3 gas furnace

OEM vs. Generic

The OEM Goodman switch is calibrated to the exact -0.40" trip point required by the GMPH050-3 venting design. Generic switches with a different setpoint can allow unsafe ignition or cause nuisance lockouts. For an air-proving safety control, matching the factory pressure rating is essential.

Installation Difficulty

Easy — Typically 15–20 minutes. Disconnect power, remove the mounting screw, transfer the hose and spade wires, and reinstall. A nut driver is the only tool needed.

Never bypass a pressure switch. Disconnect power and gas before servicing.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Goodman -0.40in NO Pressure ...

$26.95

Frequently Asked Questions

Does this Pressure Switch fit my Goodman GMPH050-3 — B1370126?

Yes. This is the factory-specified OEM pressure switch for the Goodman GMPH050-3 — B1370126. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the pressure switch on my Goodman GMPH050-3 — B1370126?

Difficulty: Medium (20–30 min)
Step 1: Turn off power. Step 2: Locate pressure switch near draft inducer. Step 3: Note tubing orientation. Step 4: Disconnect tubing and wires. Step 5: Remove screw, install new switch. Step 6: Reconnect tubing and wires, restore power.

My furnace shows a pressure switch error. What do I replace?

Furnace LED showing pressure switch error = switch not detecting draft inducer airflow. Try first: clear the rubber tubing to the switch (often clogged with condensation). If problem persists, replace the pressure switch.

Is this pressure switch compatible with Bryant or Payne too?

Many Goodman parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Goodman pressure switch?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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