What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS80903BXA Furnace — 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 AMS80903BXA Furnace — 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 Auxiliary Limit Switch 120F for AMS80903BXA Furnace — B1370155

Name: OEM Goodman Auxiliary Limit Switch 120F for AMS80903BXA Furnace — B1370155
Brand: Goodman
SKU: GOODMAN-7050
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-7050 Brand: Goodman

$11.96 $15.95

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Goodman B1370155 Auxiliary Limit Switch (120F)

The Goodman B1370155 is a genuine OEM 120°F auxiliary limit switch engineered for the AMS80903BXA gas furnace and compatible Goodman and Amana 80% AFUE models. This normally-closed thermal safety switch monitors temperature at the burner or blower compartment and opens the control circuit if it senses an unsafe overheat condition, shutting the furnace down to protect the heat exchanger and surrounding components.

Specifications

Trip point: 120°F (open on rise)
Type: Auxiliary / secondary limit, normally closed
Manual or auto-reset per OEM spec
Direct fit for AMS80903BXA and related 80% Goodman/Amana furnaces
OEM part number: B1370155

OEM vs. Generic

Our genuine OEM B1370155 is calibrated to the exact factory trip temperature, guaranteeing correct furnace safety operation. Generic aftermarket limits may differ in trip point or terminal orientation, risking nuisance lockouts or improper protection. For a safety-critical control, OEM is strongly recommended.

Install Difficulty

Easy (1/5) — A two-wire swap that most technicians complete in minutes. Always cut power at the disconnect before servicing. Professional installation is recommended for anyone unfamiliar with gas furnace safety circuits.

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 Auxiliary Limit Swit...

$11.96

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMS80903BXA Furnace — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS80903BXA Furnace — 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 AMS80903BXA Furnace — 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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