What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80904BNAA — B1370188 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 AMH80904BNAA — B1370188.

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 170°F Primary Limit Switch for AMH80904BNAA — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for AMH80904BNAA — B1370188
Brand: Goodman
SKU: GOODMAN-B1370188
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-B1370188 Brand: Goodman

$12.95 $16.95

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Goodman B1370188 Primary Limit Switch (170°F)

The B1370188 primary limit switch is a genuine OEM safety control engineered for the Goodman/Amana AMH80904BNAA 80% AFUE gas furnace. This normally-closed thermal switch monitors heat-exchanger temperature and cuts power to the burners if the furnace overheats — protecting against restricted airflow, a failed blower, or a dirty filter. When your furnace short-cycles, trips on limit, or won't fire, a drifted or open limit switch is a common culprit.

Specifications

Trip point: 170°F open, auto-reset on cool
Type: Normally-closed manual/auto high-limit safety switch
Mount: Direct flange-mount, factory-matched terminals
Fits: Goodman / Amana AMH80904BNAA and compatible 80% furnaces
Part number: B1370188 (OEM)

OEM vs. Generic

Our OEM B1370188 ships to the exact factory trip temperature and calibration, guaranteeing correct furnace safety operation and preserving your equipment warranty. A generic universal limit may carry a different set point or bracket, risking nuisance trips or an unsafe override. For a safety-critical component, we recommend the genuine OEM part.

Installation Difficulty: Easy (1/5)

A typical swap takes 15–20 minutes with a nut driver. Shut off gas and power at the disconnect, remove the two mounting screws, transfer the wire leads, and reinstall. No recalibration required. Always verify furnace operation after replacement.

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 170°F Primary Limit ...

$12.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMH80904BNAA — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80904BNAA — B1370188. 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 AMH80904BNAA — B1370188?

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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