What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT090-4B — 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 GMNT090-4B — 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.

IMAGE COMING SOON

Goodman

OEM Goodman 300°F Rollout Limit Switch for GMNT090-4B — B1370145

Name: OEM Goodman 300°F Rollout Limit Switch for GMNT090-4B — B1370145
Brand: Goodman
SKU: GOODMAN-11700
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-11700 Brand: Goodman

$4.95 $6.49

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Goodman B1370145 Rollout Limit Switch (300°F)

The B1370145 is a genuine OEM manual-reset rollout limit switch engineered for the Goodman/Amana GMNT090-4B gas furnace and compatible platforms. It is a critical flame-rollout safety device: if flames escape the burner box (from a cracked heat exchanger, blocked flue, or restricted combustion air), this switch opens at 300°F and shuts the furnace down to prevent overheating and unsafe operation.

Specifications

Type: Manual-reset rollout / flame limit switch
Open temperature: 300°F (149°C)
Mounting: Burner bracket, standard 2-terminal blade connectors
Fits: Goodman/Amana GMNT090-4B and compatible furnace models
OEM Part Number: B1370145

OEM vs. Generic

This is the factory OEM Goodman part, calibrated to the exact 300°F trip point specified for your furnace. Universal switches often use approximate trip temperatures and non-matching mounting brackets, which can cause nuisance trips or improper safety response. For a code-compliant, reliable repair we recommend the OEM switch.

Installation Difficulty

Easy (1/5). Disconnect power, unplug the two wire leads, remove the mounting screw, and swap. Most homeowners complete this in under 10 minutes. Always cut power at the breaker before servicing.

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 300°F Rollout Limit ...

$4.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMNT090-4B — B1370145?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT090-4B — 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 GMNT090-4B — 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.

Menu