What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS80704BNAA — 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 AMS80704BNAA — 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 AMS80704BNAA — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for AMS80704BNAA — B1370188
Brand: Goodman
SKU: GOODMAN-6926
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-6926 Brand: Goodman

$12.95 $16.95

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The Goodman B1370188 is a genuine OEM primary (high) limit switch built for the AMS80704BNAA gas furnace and matching Goodman/Amana 80% AFUE units. This is the furnace's main overheat safety: it senses supply-plenum temperature and opens at roughly 170°F, cutting the gas valve and burners if the heat exchanger runs too hot from low airflow, a dirty filter, or blower failure. A tripped or failed primary limit is a common cause of no-heat and short-cycling complaints.

Part number: B1370188
Type: Primary high-limit switch
Open temperature: 170°F, automatic reset
Configuration: Normally closed (N.C.)
Fits: AMS80704BNAA and related Goodman/Amana furnaces
Terminals: 1/4 in. quick-connect spade

OEM vs. Generic: The B1370188 matches the factory trip point, disc diameter, and insertion depth so the sensor sits correctly in the airstream. Universal replacements frequently trip early or late, leading to nuisance lockouts or missed protection. OEM ensures the furnace behaves exactly as the manufacturer intended and keeps your warranty and safety certifications intact.

Install difficulty: Easy (1/5). Shut off power and gas, pull the two spade connectors, remove the mounting screws, and swap in the new limit. Reconnect, restore power, and confirm a full heat cycle. About a 10–15 minute job for a technician.

Exact-fit OEM quality with fast shipping from National HVAC Parts.

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 AMS80704BNAA — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS80704BNAA — 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 AMS80704BNAA — 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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OEM Goodman 170°F Primary Limit Switch for AMS80704BNAA — B1370188

Shipping Information

Return Policy

Frequently Asked Questions