What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS81155CNA — 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 AMS81155CNA — 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 AMS81155CNA — B1370155

Name: OEM Goodman 120°F Auxiliary Limit Switch for AMS81155CNA — B1370155
Brand: Goodman
SKU: GOODMAN-7170
Price: 24.95 USD
Availability: InStock

SKU: GOODMAN-7170 Brand: Goodman

$24.95 $32.95

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The Goodman B1370155 Auxiliary Limit Switch is a genuine OEM safety control designed for the AMS81155CNA gas furnace and compatible Goodman/Amana models. This normally-closed thermal switch opens the control circuit when it senses an over-temperature condition of 120°F, shutting down the furnace to prevent heat-exchanger and cabinet damage. It is a critical, code-required safety device — a failed or bypassed limit switch is a fire and carbon-monoxide hazard.

Specifications

Trip Temperature: 120°F (auxiliary / rollout circuit)
Type: Normally-closed, automatic-reset thermal limit
OEM Part Number: B1370155
Brand: Goodman (fits Amana-branded units)
Primary Fit: AMS81155CNA gas furnace
Equipment Type: Furnace

OEM vs. Generic

This is the factory-original Goodman part, calibrated to the exact 120°F set point your furnace board expects. Generic aftermarket switches often carry loose temperature tolerances that cause nuisance shutdowns or, worse, delayed tripping. For a safety-critical control, OEM is strongly recommended over a universal substitute.

Installation Difficulty

Easy (2/5). Two-wire spade connection with a single mounting screw. Always shut off power and gas before servicing. If you are unsure why the original tripped, have a licensed HVAC technician diagnose the root cause before replacing.

Note: This is a genuine OEM Goodman replacement part. National HVAC Parts is not affiliated with or endorsed by Goodman Manufacturing.

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...

$24.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMS81155CNA — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS81155CNA — 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 AMS81155CNA — 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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