What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS81155CNAA — B1370155 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 — B1370155.

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 120°F Auxiliary Limit Switch for AMS81155CNAA — B1370155

Name: OEM Goodman 120°F Auxiliary Limit Switch for AMS81155CNAA — B1370155
Brand: Goodman
SKU: GOODMAN-7181
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-7181 Brand: Goodman

$11.96 $15.95

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The Goodman B1370155 Auxiliary Limit Switch is a genuine OEM secondary high-limit control engineered for the AMS81155CNAA furnace and compatible Goodman/Amana models. Mounted near the blower housing, this 120°F auxiliary limit acts as a backup to the primary limit — if the blower fails or airflow is restricted and cabinet temperatures climb, it de-energizes the gas valve to prevent overheating. It is a required safety component, and a furnace with a failed auxiliary limit will short-cycle or refuse to fire.

Specifications

Trip temperature: 120°F (auto-reset, open-on-rise)
Type: Auxiliary / secondary high-limit
Function: Backup overheat / airflow-loss protection
Terminals: 1/4" quick-connect spade
Fits: AMS81155CNAA and compatible Goodman & Amana furnaces
Part number: B1370155

OEM vs. Generic

The genuine Goodman OEM part is factory-calibrated to the 120°F trip point matched to this cabinet's airflow design. Generic replacements rarely match the exact mounting bracket or trip temperature, risking nuisance trips or inadequate protection. For a secondary safety control, OEM is the reliable choice.

Installation Difficulty

Easy (DIY-friendly). Disconnect power, unplug the two spade terminals, remove the mounting screws, and swap in the new switch. Estimated time: 10–15 minutes. Verify blower operation and clean airflow after replacement to avoid 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 120°F Auxiliary Limi...

$11.96

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMS81155CNAA — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS81155CNAA — B1370155. 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 — B1370155?

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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