What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS81155CNAA — 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 AMS81155CNAA — 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 AMS81155CNAA — B1370198

Name: OEM Goodman 150°F Primary Limit Switch for AMS81155CNAA — B1370198
Brand: Goodman
SKU: GOODMAN-7182
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-7182 Brand: Goodman

$12.95 $16.95

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The Goodman B1370198 Primary Limit Switch is a genuine OEM high-limit safety control built for the AMS81155CNAA gas furnace and compatible Goodman/Amana models. Positioned over the heat exchanger, this 150°F primary limit continuously monitors supply-air temperature. If the furnace overheats — typically from a dirty filter, closed registers, or a failed blower — it opens the gas valve circuit to shut down combustion and protect the heat exchanger from cracking. It is the furnace's front-line overheat protection.

Specifications

Trip temperature: 150°F (auto-reset, open-on-rise)
Type: Primary high-limit
Function: Heat-exchanger overheat cutoff
Terminals: 1/4" quick-connect spade
Fits: AMS81155CNAA and compatible Goodman & Amana furnaces
Part number: B1370198

OEM vs. Generic

This genuine Goodman OEM limit is calibrated to the precise 150°F trip point the AMS81155CNAA was designed for, with the correct insertion depth and bracket. Generic universal limits force you to guess the trip temperature and often mount poorly, leading to nuisance lockouts or unsafe operation. Always use OEM for the primary limit.

Installation Difficulty

Easy to Moderate. Shut off power and gas, remove the two mounting screws and spade terminals, and install the new limit in the same orientation. Estimated time: 15–20 minutes. Replace the air filter and confirm proper airflow to prevent repeat trips.

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 AMS81155CNAA — B1370198?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS81155CNAA — 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 AMS81155CNAA — 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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