What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80905CNAA — B1370189 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 AMH80905CNAA — B1370189.

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 200°F Primary Limit Switch for AMH80905CNAA — B1370189

Name: OEM Goodman 200°F Primary Limit Switch for AMH80905CNAA — B1370189
Brand: Goodman
SKU: GOODMAN-5851
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-5851 Brand: Goodman

$9.95 $12.95

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The Goodman B1370189 Primary Limit Switch is the genuine OEM high-limit safety control for Amana/Goodman AMH80905CNAA 80% AFUE furnaces. Mounted on the heat exchanger bulkhead, this switch continuously monitors supply-air temperature and opens the gas valve circuit at roughly 200°F to prevent dangerous overheating caused by restricted airflow, a dirty filter, or blower failure.

Specifications

OEM Part Number: B1370189
Type: Primary (main) high-limit switch
Open Temperature: 200°F, auto-reset
Contacts: Normally closed (SPST)
Fits: Goodman/Amana AMH80905CNAA furnace
Brand: Genuine Goodman OEM

OEM vs. Generic

The OEM Goodman primary limit guarantees factory trip-point accuracy and an exact bracket match, which matters most on a safety-critical control. The generic equivalent meets the same 200°F rating and electrical specs at a lower price for value-focused repairs, using a UL-recognized aftermarket switch.

Symptoms of Failure

A tripped or failed primary limit typically shows as the blower running continuously while the burners stay off, repeated limit lockouts, or no heat. Before replacing, confirm airflow is not restricted so the new switch isn't tripping legitimately.

Installation Difficulty

Easy (1/5) — Remove two screws, transfer the spade connectors, and remount. Cut power at the breaker first. Typical replacement time is 10–15 minutes.

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 200°F Primary Limit ...

$9.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMH80905CNAA — B1370189?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80905CNAA — B1370189. 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 AMH80905CNAA — B1370189?

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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