What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT070-3B — 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 GDT070-3B — 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 GDT070-3B — B1370155

Name: OEM Goodman 120°F Auxiliary Limit Switch for GDT070-3B — B1370155
Brand: Goodman
SKU: GOODMAN-10437
Price: 24.95 USD
Availability: InStock

SKU: GOODMAN-10437 Brand: Goodman

$24.95 $32.95

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Goodman B1370155 Auxiliary Limit Switch (120°F)

The Goodman B1370155 auxiliary limit switch is the factory-specified overheat safety for the GDT070-3B gas furnace. It watches blower-compartment and secondary heat-exchanger temperatures and opens the control circuit to stop the burners if heat exceeds its 120°F trip point. Common failure symptoms include short-cycling on the heat call, intermittent no-heat, or a furnace that runs the blower but won't light — all reasons to replace an aged or drifted limit switch.

Specifications

Part Number: B1370155
Type: Auxiliary (secondary) limit switch
Trip Temperature: 120°F (automatic reset)
Fits Model: Goodman GDT070-3B furnace
Function: Overtemperature safety cutout
Equipment: Gas furnace

OEM vs. Generic

This genuine OEM Goodman switch is calibrated to the precise 120°F set point your furnace board expects. Generic equivalents may cost less but often carry wider temperature tolerances, leading to premature nuisance trips or delayed protection. On a safety component, the OEM part is the reliable choice.

Installation Difficulty

Rating: Easy (1/5). Kill power at the breaker, pull the two spade terminals, unscrew the old switch, and mount the replacement in the same orientation. Reconnect and restore power. Typical replacement time is 10–15 minutes with basic hand tools. If the limit keeps tripping after replacement, check for restricted airflow (dirty filter, closed vents, failing blower) or 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 GDT070-3B — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT070-3B — 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 GDT070-3B — 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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