What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80905CNAA — 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 AMH80905CNAA — 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 AMH80905CNAA — B1370155

Name: OEM Goodman 120°F Auxiliary Limit Switch for AMH80905CNAA — B1370155
Brand: Goodman
SKU: GOODMAN-5850
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-5850 Brand: Goodman

$11.96 $15.95

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The Goodman B1370155 Auxiliary Limit Switch is a genuine OEM safety control engineered as a direct-fit replacement for Amana/Goodman AMH80905CNAA 80% AFUE gas furnaces. This normally-closed thermal switch opens at approximately 120°F to shut down the burner circuit if it detects abnormal heat buildup near the blower or secondary limit zone, protecting your heat exchanger and cabinet from overheating damage.

Specifications

OEM Part Number: B1370155
Type: Auxiliary (secondary) limit switch
Open Temperature: 120°F, auto-reset
Contacts: Normally closed (SPST)
Fits: Goodman/Amana AMH80905CNAA furnace
Brand: Genuine Goodman OEM

OEM vs. Generic

Our OEM Goodman switch is factory-calibrated to the exact trip temperature and mounting footprint your furnace expects, ensuring reliable, code-compliant operation. The generic equivalent offers a budget-friendly alternative built to matching temperature and electrical specs — ideal for cost-conscious repairs where an aftermarket UL-listed control is acceptable.

Symptoms of Failure

A failed auxiliary limit can cause the furnace to short-cycle, trip on limit, or refuse to fire. If your furnace runs then shuts down on a limit fault, this switch is a common, inexpensive culprit.

Installation Difficulty

Easy (1/5) — Two mounting screws and a pair of push-on spade terminals. Always disconnect power at the furnace switch or breaker before servicing. Most DIYers complete this repair in under 15 minutes.

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 AMH80905CNAA — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80905CNAA — 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 AMH80905CNAA — 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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