What are the specs for this Limit Switch?

The correct replacement for Goodman model GMTH090-5B — B1370189 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 GMTH090-5B — B1370189.

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 200°F Primary Limit Switch for GMTH090-5B — B1370189

Name: OEM Goodman 200°F Primary Limit Switch for GMTH090-5B — B1370189
Brand: Goodman
SKU: GOODMAN-B1370189
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-B1370189 Brand: Goodman

$9.95 $12.95

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Goodman B1370189 Primary Limit Switch — 200°F

The Goodman B1370189 primary limit switch is a genuine OEM high-limit safety control rated at 200°F for the GMTH090-5B gas furnace. As the main overheat protector, it monitors supply-air temperature at the heat exchanger and opens the burner circuit when the furnace exceeds its safe operating limit — guarding against restricted airflow, a failed blower, or an oversized temperature rise.

Specifications

Part number: B1370189 (OEM Goodman)
Type: Primary high limit switch
Trip temperature: 200°F
Function: Normally closed, opens on overheat
Fits: Goodman GMTH090-5B gas furnace
Equipment: Gas furnace

OEM vs. Generic

The OEM B1370189 is calibrated to the precise 200°F setpoint Goodman engineered for this furnace's temperature rise. A generic limit with the wrong rating can short-cycle the burner or allow unsafe temperatures. Because this is the furnace's primary safety limit, we recommend the OEM part.

Installation Difficulty: Easy

Rated Easy — two spade terminals and a bracket screw. Turn off power at the disconnect first. If the old limit was tripping, correct any airflow restriction (dirty filter, closed dampers, weak blower) before restarting the furnace.

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 200°F Primary Limit ...

$9.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMTH090-5B — B1370189?

Yes. This is the factory-specified OEM limit switch for the Goodman GMTH090-5B — B1370189. 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 GMTH090-5B — B1370189?

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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