What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT070-3B — B1370145 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 GMNT070-3B — B1370145.

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 300F Rollout Switch for GMNT070-3B — B1370145

Name: OEM Goodman 300F Rollout Switch for GMNT070-3B — B1370145
Brand: Goodman
SKU: GOODMAN-11655
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-11655 Brand: Goodman

$4.95 $6.49

OEM Guaranteed

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Texas CMBL #19328542014

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The Goodman B1370145 Flame Rollout Switch is a genuine OEM safety limit designed for the GMNT070-3B gas furnace and many other Goodman and Amana models. This manual-reset switch monitors the burner compartment for flame rollout — a dangerous condition where combustion escapes the heat exchanger — and cuts power to the gas valve if temperatures exceed its 300°F trip point, protecting the equipment and your home.

Specifications

Trip temperature: 300°F (open on rise)
Reset type: Manual reset button
Function: Flame / burner rollout safety limit
OEM part number: B1370145
Primary fit: Goodman GMNT070-3B furnace
Terminals: 1/4" quick-connect spade

OEM vs. Generic

This is a genuine Goodman OEM switch, calibrated to the exact 300°F setpoint your furnace's control sequence expects. Aftermarket rollout switches sometimes trip early or late, causing nuisance lockouts or, worse, failing to open when they should. For a safety-critical limit, we recommend the OEM part every time.

Install Difficulty

Easy (1/5). Turn off power at the furnace switch, unplug the two spade terminals, remove the two mounting screws, and swap in the new switch. Most homeowners complete this in under 10 minutes with a nut driver. If the switch has tripped, always diagnose the root cause (blocked flue, cracked heat exchanger, or bad inducer) before resetting.

Genuine Goodman quality, backed by our fast-shipping guarantee. Verify your model number before ordering to ensure correct fit.

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 300F Rollout Switch ...

$4.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMNT070-3B — B1370145?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT070-3B — B1370145. 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 GMNT070-3B — B1370145?

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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