What are the specs for this Limit Switch?

The correct replacement for Goodman model GMTH070-4A — 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 GMTH070-4A — 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 120F Auxiliary Limit Switch for GMTH070-4A — B1370155

Name: OEM Goodman 120F Auxiliary Limit Switch for GMTH070-4A — B1370155
Brand: Goodman
SKU: GOODMAN-12546
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-12546 Brand: Goodman

$11.96 $15.95

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Goodman B1370155 Auxiliary Limit Switch (120°F)

The B1370155 is a genuine OEM auxiliary high-limit switch for the Goodman GMTH070-4A furnace and compatible Goodman and Amana models. Mounted near the blower or secondary heat-exchanger area, this 120°F auto-reset control senses abnormal temperature and interrupts the heating circuit to prevent overheating when airflow is restricted — for example by a clogged filter or failing blower. It is a common cause of intermittent no-heat and short-cycling complaints.

Specifications

Trip temperature: 120°F
Type: Auxiliary auto-reset high-limit switch
Function: Secondary temperature safety / airflow protection
Fits: Goodman GMTH070-4A and compatible furnaces
Brand: Goodman OEM

OEM vs. Generic

The factory OEM B1370155 guarantees the correct 120°F calibration and bracket geometry for the GMTH070-4A cabinet. Generic substitutes often differ in trip point or mounting angle, which can cause nuisance trips or improper seating against the heat exchanger. Choose OEM for reliable, safe operation.

Install Difficulty

Easy (1/5). Disconnect power, unplug the two spade connectors, remove the mounting screw(s), and reverse to install. About 10–15 minutes.

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 120F Auxiliary Limit...

$11.96

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMTH070-4A — B1370155?

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