What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS80904BXAA — 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 AMS80904BXAA — 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 AMS80904BXAA — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for AMS80904BXAA — B1370188
Brand: Goodman
SKU: GOODMAN-7093
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-7093 Brand: Goodman

$12.95 $16.95

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Goodman B1370188 170°F Primary Limit Switch

The B1370188 is a genuine Goodman primary high-limit switch rated at 170°F, designed as an exact-fit replacement for the Goodman AMS80904BXAA gas furnace. The primary limit is the furnace's main overheat protection: it monitors heat-exchanger temperature and shuts off the burners if the plenum gets too hot, typically from low airflow. A failed primary limit is a frequent cause of short-cycling or a furnace that won't fire.

Specifications

Trip temperature: 170°F
Type: Primary high-limit switch (auto-reset)
Function: Normally closed, opens on overheat
Fit: Direct OEM replacement for AMS80904BXAA
OEM Part Number: B1370188
Brand: Goodman / Amana

OEM vs. Generic

The primary limit governs safe operating temperature, so an exact calibration matters. The genuine OEM Goodman switch is factory-set to the correct 170°F trip point and mounting flange. Generic substitutes may not match the trip temperature or bracket, risking nuisance shutdowns or overheating — we recommend OEM for this control.

Install Difficulty

Easy — unplug the two spade terminals, remove the mounting screws, and fit the replacement in the same position. About 15 minutes for a typical homeowner. Always disconnect power and gas first, and never jump out a limit switch.

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 AMS80904BXAA — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS80904BXAA — 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 AMS80904BXAA — 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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