What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS81405DNAA — 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 AMS81405DNAA — 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 High-Limit Switch for AMS81405DNAA — B1370198

Name: OEM Goodman 150°F Primary High-Limit Switch for AMS81405DNAA — B1370198
Brand: Goodman
SKU: GOODMAN-7247
Price: 29.95 USD
Availability: InStock

SKU: GOODMAN-7247 Brand: Goodman

$29.95 $39.95

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The Goodman B1370198 Primary Limit Switch is a genuine OEM high-limit safety control engineered for the AMS81405DNAA gas furnace and compatible Goodman/Amana models. Positioned on the heat exchanger bulkhead, the primary limit is the furnace's main line of defense against overheating, shutting off the burners if supply air temperature climbs too high.

With a 150°F trip point, this switch protects the heat exchanger from thermal stress and cracking caused by insufficient airflow — the most common cause being a clogged air filter or a weak blower. A failed primary limit is a frequent reason for no-heat and lockout complaints.

Specifications

Trip Temperature: 150°F
Type: Primary high-limit switch (heat exchanger)
OEM Part Number: B1370198
Reset: Automatic
Compatibility: Goodman/Amana AMS81405DNAA and related furnaces

OEM vs. Generic

The OEM Goodman primary limit matches the precise trip temperature and mounting bracket your furnace requires. Because this switch guards the heat exchanger, a mis-spec'd generic can allow dangerous overheating or cause frustrating nuisance trips. OEM is strongly recommended.

Installation Difficulty

Easy to Moderate (2/5) — Requires removing the burner-compartment or bracket access panel. Disconnect power first, transfer the wiring, and mount the new switch. If trips continue, replace the air filter and verify blower operation.

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 High-L...

$29.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMS81405DNAA — B1370198?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS81405DNAA — 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 AMS81405DNAA — 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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