What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80903BNAC — B1370198 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 AMH80903BNAC — B1370198.

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 150°F Primary Limit Switch for AMH80903BNAC — B1370198

Name: OEM Goodman 150°F Primary Limit Switch for AMH80903BNAC — B1370198
Brand: Goodman
SKU: GOODMAN-5721
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-5721 Brand: Goodman

$12.95 $16.95

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Goodman B1370198 Primary Limit Switch (150°F)

The OEM Goodman B1370198 is the primary high-limit safety switch for the Goodman/Amana AMH80903BNAC gas furnace and compatible 80% AFUE units. Mounted on the heat exchanger housing, it opens the gas valve circuit whenever supply-air temperature exceeds the 150°F trip point — the front-line defense against a cracked or overheated heat exchanger caused by dirty filters, blocked ducts, or blower failure.

Specifications

Trip temperature: 150°F (open on rise)
Type: Primary high-limit switch
Contact configuration: Normally closed, automatic reset
Compatible model: AMH80903BNAC and related 80% furnaces
Genuine Goodman/Amana OEM component

OEM vs. Generic

Because the primary limit is the furnace's main overheat safeguard, exact calibration matters. The genuine OEM B1370198 trips precisely at 150°F as designed. Aftermarket units can drift out of spec, leading to short-cycling on limit or, worse, delayed shut-off. OEM keeps your furnace within manufacturer safety tolerances and warranty terms.

Installation Difficulty

Easy (2/5). The switch fastens with one or two screws and two spade connectors. Always cut power and gas before servicing, photograph the wiring, and confirm the mounting orientation matches the original. When in doubt, use a licensed HVAC professional — this component is safety-critical.

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 150°F Primary Limit ...

$12.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMH80903BNAC — B1370198?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80903BNAC — B1370198. 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 AMH80903BNAC — B1370198?

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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