What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80904BNAB — 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 AMH80904BNAB — 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 AMH80904BNAB — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for AMH80904BNAB — B1370188
Brand: Goodman
SKU: GOODMAN-5787
Price: 23.95 USD
Availability: InStock

SKU: GOODMAN-5787 Brand: Goodman

$23.95 $31.95

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The Goodman B1370188 Primary Limit Switch is the genuine OEM high-limit control for the AMH80904BNAB gas furnace and matching Goodman/Amana 80% AFUE models. Installed on the heat exchanger bulkhead, it is the furnace's primary overheat safeguard — sensing supply-air temperature and shutting off the gas valve if the plenum exceeds its safe operating range, most often due to a dirty filter, blocked ducting, or blower failure.

Specifications

Trip temperature: 170°F
Reset type: Automatic reset
Function: Primary high-temperature limit
OEM Part Number: B1370188
Fits: AMH80904BNAB and related Goodman/Amana furnaces
Brand: Goodman (Daikin family)

OEM vs. Generic

The genuine OEM B1370188 delivers the precise 170°F calibration and mounting footprint your furnace requires. Because the primary limit is the main line of defense against a cracked heat exchanger and overheating, we do not recommend generic switches with looser tolerances — a mismatched trip point can cause short-cycling or, worse, fail to protect the unit.

Install Difficulty

Easy (1/5). Turn off power, disconnect the two terminals, remove the mounting screws, and set the new limit flush against the heat exchanger. About 10–15 minutes. Resolve any airflow restriction before returning the furnace to service.

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 ...

$23.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMH80904BNAB — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80904BNAB — 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 AMH80904BNAB — 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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