What are the specs for this Limit Switch?

The correct replacement for Goodman model GMTH090-5A — B1370145 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 GMTH090-5A — B1370145.

What symptoms indicate I need a new limit switch?

Common symptoms that indicate you need a new limit switch include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this limit 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 Rollout Limit Switch 300°F for GMTH090-5A — B1370145

Name: OEM Goodman Rollout Limit Switch 300°F for GMTH090-5A — B1370145
Brand: Goodman
SKU: GOODMAN-12576
Price: 8.95 USD
Availability: InStock

SKU: GOODMAN-12576 Brand: Goodman

$8.95 $11.95

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Texas CMBL #19328542014

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The Goodman B1370145 is a genuine 300°F flame rollout limit switch for GMTH090-5A gas furnaces. Mounted on the burner assembly, this manual-reset safety device opens the ignition circuit if flames roll out of the burner box or excessive heat is detected — protecting the cabinet, wiring, and your home from a blocked heat exchanger or restricted venting. When this switch trips, the furnace will not fire until the fault is corrected and the button is reset.

Trip temperature: 300°F (opens on rise)
Reset type: Manual push-button reset
Function: Flame rollout / high-limit safety cutoff
Terminals: Standard 1/4" spade quick-connect
Fit: Goodman GMTH090-5A and compatible furnaces
OEM part number: B1370145

OEM vs. Generic: Because this is a life-safety component, the exact trip point and calibration matter. The genuine Goodman B1370145 is factory-calibrated to 300°F. Generic switches with the wrong trip temperature can either nuisance-trip or, worse, fail to trip when needed. We strongly recommend OEM for all safety limit devices.

Install difficulty: Easy (2/5). Disconnect power, unplug the two spade terminals, remove the mounting screw(s), and install the new switch in the same orientation. Reconnect and test. If the new switch trips again, diagnose the underlying overheating cause before returning the furnace to service.

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 Rollout Limit Switch...

$8.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMTH090-5A — B1370145?

Yes. This is the factory-specified OEM limit switch for the Goodman GMTH090-5A — B1370145. 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 limit switch on my Goodman GMTH090-5A — B1370145?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new limit switch?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this limit 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 limit 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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OEM Goodman Rollout Limit Switch 300°F for GMTH090-5A — B1370145

Shipping Information

Return Policy

Frequently Asked Questions