What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80904BXAA — 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 AMH80904BXAA — 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 AMH80904BXAA — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for AMH80904BXAA — B1370188
Brand: Goodman
SKU: GOODMAN-5811
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-5811 Brand: Goodman

$12.95 $16.95

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The OEM Goodman B1370188 Primary Limit Switch is the main high-temperature safety control for the AMH80904BXAA gas furnace and compatible Goodman/Amana models. Mounted on the heat exchanger bulkhead, this normally-closed switch monitors supply-air temperature and opens at a 170°F cutout to de-energize the gas valve if the blower fails or airflow is restricted — preventing heat-exchanger damage and unsafe operating conditions.

Trip temperature: 170°F cutout (auto-reset)
Configuration: Normally-closed (N.C.) thermal limit
Function: Primary high-limit safety control
Fits: Goodman/Amana AMH80904BXAA and related 80% furnaces
OEM Part Number: B1370188

OEM vs. Generic

Primary limits must trip at exactly the temperature your furnace was designed around. This genuine Goodman part carries the factory 170°F calibration and correct mounting bracket, so it seats flush against the heat exchanger for accurate sensing. Generic substitutes with the wrong cutout can cause premature lockouts or, worse, fail to trip when needed.

Installation Difficulty: Easy

Rated Easy. With power and gas off, remove the two mounting screws, unplug the two spade terminals, and install the replacement in reverse — about 15 minutes. Confirm the part number against your unit's wiring diagram and run a full heat cycle to verify proper operation. When in doubt, have a licensed HVAC professional perform the repair.

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 AMH80904BXAA — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80904BXAA — 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 AMH80904BXAA — 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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