What are the specs for this Limit Switch?

The correct replacement for Goodman model GMTH070-4B — 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 GMTH070-4B — 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 GMTH070-4B — B1370155

Name: OEM Goodman 120°F Auxiliary Limit Switch for GMTH070-4B — B1370155
Brand: Goodman
SKU: GOODMAN-12555
Price: 24.95 USD
Availability: InStock

SKU: GOODMAN-12555 Brand: Goodman

$24.95 $32.95

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Goodman B1370155 Auxiliary Limit Switch (120°F)

The B1370155 is a genuine OEM auxiliary high-limit switch engineered for the Goodman GMTH070-4B gas furnace and compatible Goodman/Amana models. This temperature-activated safety control opens the circuit when the auxiliary sensing zone reaches its 120°F trip point, protecting the heat exchanger and blower assembly from overheating during abnormal airflow conditions. Installing the correct limit switch keeps your furnace's safety chain intact and prevents nuisance lockouts.

Specifications

Part Number: B1370155
Type: Auxiliary high-limit / rollout safety switch
Trip Temperature: 120°F (open on rise, auto-reset)
Brand: Goodman (Amana compatible)
Equipment: Gas furnace — fits GMTH070-4B
Mounting: Direct OEM replacement, bracket-mount

OEM vs. Generic

Our OEM Goodman B1370155 matches the factory trip point and terminal layout exactly for guaranteed fit and calibration. The generic equivalent delivers the same 120°F protection at a lower price point — a smart choice for budget-conscious repairs where an exact factory part number isn't required.

Installation Difficulty

Easy (1/5). A basic two-wire swap that most DIY homeowners complete in under 15 minutes with a nut driver. Always disconnect power at the breaker before servicing. If you're unsure about your furnace's safety circuit, consult a licensed HVAC technician.

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 GMTH070-4B — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman GMTH070-4B — 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 GMTH070-4B — 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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