What are the specs for this Pressure Switch?

The correct replacement for Goodman model OEM Goodman -0.40" WC NO Pressure Switch GMPV125-5 — 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 OEM Goodman -0.40" WC NO Pressure Switch GMPV125-5 — 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 -0.40" WC NO Pressure Switch GMPV125-5 — B1370126

Name: OEM Goodman -0.40" WC NO Pressure Switch GMPV125-5 — B1370126
Brand: Goodman
SKU: GOODMAN-12181
Price: 26.95 USD
Availability: InStock

SKU: GOODMAN-12181 Brand: Goodman

$26.95 $34.95

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The Goodman B1370126 Pressure Switch is a genuine OEM safety control for the GMPV125-5 gas furnace. Rated at -0.40" water column with normally open contacts, this switch verifies that the inducer draft motor is pulling adequate negative pressure before the control board permits ignition. If venting is blocked or the inducer fails, the switch stays open and locks out the furnace — a critical protection against flue-gas spillage.

Specifications

Part type: Air-proving / draft pressure switch
Manufacturer part number: B1370126
Trip point: -0.40" WC (negative pressure)
Contact configuration: Normally Open (NO)
Compatible model: Goodman GMPV125-5 furnace

OEM vs. Generic

The OEM B1370126 is calibrated to Goodman's exact -0.40" setpoint and uses the correct hose-port and terminal layout. Generic switches with a mismatched setpoint can cause nuisance lockouts or, worse, allow operation under unsafe draft conditions. On a combustion safety device, the OEM part is the right choice.

Installation Difficulty

Easy (2 of 5). Disconnect power, remove the pressure hose and two spade terminals, unscrew the switch, and reverse to install. A multimeter helps confirm operation. Always verify draft after replacement.

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 -0.40" WC NO Pressur...

$26.95

Frequently Asked Questions

Does this Pressure Switch fit my Goodman OEM Goodman -0.40" WC NO Pressure Switch GMPV125-5 — B1370126?

Yes. This is the factory-specified OEM pressure switch for the Goodman OEM Goodman -0.40" WC NO Pressure Switch GMPV125-5 — 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 OEM Goodman -0.40" WC NO Pressure Switch GMPV125-5 — 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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