What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT090-4B — B1370194 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 GDT090-4B — B1370194.

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 250°F Primary Limit Switch for GDT090-4B — B1370194

Name: OEM Goodman 250°F Primary Limit Switch for GDT090-4B — B1370194
Brand: Goodman
SKU: GOODMAN-B1370194
Price: 46.95 USD
Availability: InStock

SKU: GOODMAN-B1370194 Brand: Goodman

$46.95 $61.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

The Goodman B1370194 Primary Limit Switch is the genuine OEM high-limit safety control for the Goodman/Amana GDT090-4B gas furnace and compatible models. This primary limit monitors supply-air temperature at the heat exchanger and opens at approximately 250°F if airflow is restricted or the blower fails, cutting the gas valve to prevent a dangerous overheat condition.

Specifications

Trip temperature: 250°F (open on rise)
Function: Primary high-limit overheat protection
Contact type: Normally closed, automatic reset
Fits: Goodman/Amana GDT090-4B and related furnace models
Mounting: Insertion-style with mounting flange and quick-connect terminals
Brand: Genuine Goodman OEM

OEM vs. Generic

The OEM B1370194 is matched to the GDT090's heat-exchanger geometry and factory trip calibration, so the probe length and setpoint are exactly what the furnace board expects. Generic replacements frequently differ in probe insertion depth and reset temperature, which can cause premature lockouts, short cycling, or — worse — a limit that trips too late. On a primary safety limit, genuine OEM is strongly recommended.

Installation Difficulty

Easy (2/5). Plan on 15–20 minutes: kill power and gas, disconnect the two terminals, remove the mounting screws, and slide the probe out of the heat-exchanger opening. Install the new switch at the same depth and orientation, reconnect, and run a full heat cycle to confirm proper limit operation. When in doubt, use a licensed HVAC professional.

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 250°F Primary Limit ...

$46.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT090-4B — B1370194?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT090-4B — B1370194. 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 GDT090-4B — B1370194?

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