What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80704BNAA — 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 AMH80704BNAA — 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 AMH80704BNAA — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for AMH80704BNAA — B1370188
Brand: Goodman
SKU: GOODMAN-5347
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-5347 Brand: Goodman

$12.95 $16.95

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The Goodman B1370188 is the factory-OEM primary high-limit switch for the Amana/Goodman AMH80704BNAA gas furnace. Positioned on the heat-exchanger bulkhead, this control is the furnace's main overheat protection: it opens the gas circuit if supply-air temperature climbs past the 170°F set point due to low airflow or a stuck blower, then auto-resets once the plenum cools.

Specifications

Trip temperature: 170°F (automatic reset)
Type: Primary high-limit safety switch
Terminals: 1/4" quick-connect spade
OEM Part Number: B1370188
Fits: AMH80704BNAA and compatible Goodman/Amana 80% furnaces

OEM vs. Generic

Because the primary limit governs the furnace's core overheat shutdown, the exact OEM trip temperature matters. The genuine B1370188 is calibrated to 170°F and uses the correct disc diameter and insertion depth. Aftermarket substitutes with different set points can cause repeated limit trips or allow the heat exchanger to run too hot — a durability and safety risk. OEM is strongly recommended here.

Installation

Difficulty: Easy to Moderate. Shut off power, note the wiring, unplug the terminals, remove the mounting screws, and seat the new switch flush against the bulkhead in the original orientation. About 15 minutes. Confirm proper airflow and filter condition 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 ...

$12.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMH80704BNAA — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80704BNAA — 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 AMH80704BNAA — 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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