What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80903BNAB — 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 AMH80903BNAB — 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 120F Auxiliary Limit Switch for AMH80903BNAB — B1370155

Name: OEM Goodman 120F Auxiliary Limit Switch for AMH80903BNAB — B1370155
Brand: Goodman
SKU: GOODMAN-5708
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-5708 Brand: Goodman

$11.96 $15.95

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The OEM Goodman B1370155 auxiliary limit switch is a genuine 120°F overheat safety limit for AMH80903BNAB furnaces and other compatible Goodman and Amana models. It protects the blower and cabinet by opening the control circuit if temperatures in the blower compartment exceed safe levels — typically triggered by a failed blower, blocked return, or dirty filter. A bad auxiliary limit can cause the furnace to short-cycle or fail to run.

Specifications

Trip temperature: 120°F
Type: auxiliary/secondary overheat limit
Auto-reset on temperature drop
Fits: Goodman/Amana AMH80903BNAB and compatible furnaces
OEM part number: B1370155

OEM vs. Generic

The OEM B1370155 is set to the precise 120°F threshold required by your furnace's safety design. As a protective limit, matching the exact trip point is critical — generic substitutes with different calibration risk both nuisance trips and unsafe overheating. Genuine OEM ensures correct protection.

Installation Difficulty

Easy. Disconnect power, remove the two spade connectors, unscrew the mounting bracket, and fit the replacement in the same location and orientation. Verify airflow and filter condition, since these often cause an auxiliary limit to trip in the first place.

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 120F Auxiliary Limit...

$11.96

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMH80903BNAB — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80903BNAB — 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 AMH80903BNAB — 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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