What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80704BNAC — 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 AMH80704BNAC — 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 AMH80704BNAC — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for AMH80704BNAC — B1370188
Brand: Goodman
SKU: GOODMAN-5372
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-5372 Brand: Goodman

$12.95 $16.95

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The Goodman B1370188 Primary Limit Switch is a genuine OEM high-limit safety control for AMH80704BNAC Goodman and Amana gas furnaces. Positioned over the heat exchanger in the supply-air stream, this switch continuously monitors plenum temperature and opens at approximately 170°F to de-energize the gas valve if the furnace overheats — a common symptom of restricted airflow, a dirty filter, or blower failure. It is the furnace's primary defense against heat-exchanger damage.

Specifications

Part Number: B1370188
Type: Primary high-limit switch
Trip Temperature: 170°F open on rise
Action: Normally closed, automatic reset
Compatibility: Goodman / Amana AMH80704BNAC 80% AFUE furnaces
Brand: Genuine OEM Goodman

OEM vs. Generic

The primary limit's calibration protects your most expensive furnace component — the heat exchanger. Generic switches with imprecise set points can trip early (nuisance short-cycling) or too late (allowing dangerous overheating). The OEM B1370188 delivers the exact 170°F cutout, insertion depth, and bracket dimensions Goodman specified for the AMH80704BNAC.

Installation Difficulty: Easy

Rated Easy (1/5). Shut off power, unplug the two terminals, remove the two mounting screws, and slide the replacement into the same location on the heat-exchanger panel. Restore power and verify the furnace completes a full heat cycle without tripping. Typically a 10–15 minute job. Address any underlying airflow restriction before returning the unit to service.

Protect your Goodman or Amana furnace with genuine OEM overheat protection.

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 AMH80704BNAC — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80704BNAC — 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 AMH80704BNAC — 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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