What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT090-4B — B1370155 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 GDT090-4B — B1370155.

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 120°F Auxiliary Limit Switch for GDT090-4B — B1370155

Name: OEM Goodman 120°F Auxiliary Limit Switch for GDT090-4B — B1370155
Brand: Goodman
SKU: GOODMAN-B1370155
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-B1370155 Brand: Goodman

$11.96 $15.95

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The Goodman B1370155 Auxiliary Limit Switch is a genuine OEM safety component engineered for the Goodman/Amana GDT090-4B gas furnace and compatible platform models. This normally-closed thermal switch opens at approximately 120°F to protect the furnace against abnormal heat buildup around the blower compartment or secondary heat exchanger, shutting down the burner circuit before damage or an unsafe condition can develop.

Specifications

Trip temperature: 120°F (open on rise)
Function: Auxiliary / rollout limit safety cutout
Contact type: Normally closed, automatic reset
Fits: Goodman/Amana GDT090-4B and related furnace models
Mounting: Bracket-mount with quick-connect terminals
Brand: Genuine Goodman OEM

OEM vs. Generic

Because this is a life-safety component, the OEM B1370155 is calibrated to Goodman's exact trip point and factory tolerances, ensuring the furnace's control logic behaves as designed. Generic universal limit switches may carry a similar temperature rating but can vary in reset behavior, bracket geometry, and terminal spacing — often requiring modification and risking nuisance trips or delayed shutdowns. For a safety switch, we recommend genuine OEM.

Installation Difficulty

Easy (1/5). Replacement typically takes under 15 minutes: shut off power and gas, disconnect the two spade terminals, unscrew the bracket, and reverse the process with the new switch. Always verify furnace operation and confirm the switch resets properly after a heat cycle. If you are unsure or smell gas, contact a licensed HVAC technician.

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 120°F Auxiliary Limi...

$11.96

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT090-4B — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT090-4B — B1370155. 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 GDT090-4B — B1370155?

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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