What are the specs for this Limit Switch?

The correct replacement for Goodman model GMT070-4 — B1370919 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 GMT070-4 — B1370919.

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 170°F Primary Limit Switch for GMT070-4 — B1370919

Name: OEM Goodman 170°F Primary Limit Switch for GMT070-4 — B1370919
Brand: Goodman
SKU: GOODMAN-12328
Price: 20.95 USD
Availability: InStock

SKU: GOODMAN-12328 Brand: Goodman

$20.95 $27.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

The Goodman B1370919 Primary Limit Switch is a genuine OEM 170°F high-limit control with a 7 inch insert length, built as a direct-fit replacement for the GMT070-4 gas furnace. Mounted on the heat exchanger bulkhead, it monitors supply-air temperature and opens the gas/ignition circuit if the furnace overheats — typically from restricted airflow such as a clogged filter or a failing blower. It auto-resets once temperatures return to normal.

Specifications

Trip temperature: 170°F (open on rise)
Insert length: 7 in.
Reset type: automatic
Function: primary high-limit safety control
Fits: Goodman GMT070-4 furnace
OEM Part Number: B1370919

OEM vs. Generic

Limit switches protect the heat exchanger from thermal damage, so the calibrated 170°F set point and correct 7 in. probe depth are critical. The genuine Goodman switch matches both exactly. Universal limits with adjustable dials require field calibration and are easy to set wrong. For a heat-exchanger safety, choose OEM.

Install Difficulty

Easy. Remove two mounting screws, transfer the two wire leads, and seat the new switch at the same depth — about 15 minutes. Disconnect power first. Repeated tripping usually means an airflow problem, not a bad switch.

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 170°F Primary Limit ...

$20.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMT070-4 — B1370919?

Yes. This is the factory-specified OEM limit switch for the Goodman GMT070-4 — B1370919. 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 GMT070-4 — B1370919?

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