What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT070-3B Furnace — B1370193 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 GDT070-3B Furnace — B1370193.

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 High Limit Switch for GDT070-3B Furnace — B1370193

Name: OEM Goodman High Limit Switch for GDT070-3B Furnace — B1370193
Brand: Goodman
SKU: GOODMAN-10439
Price: 28.95 USD
Availability: InStock

SKU: GOODMAN-10439 Brand: Goodman

$28.95 $38.95

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Goodman B1370193 High Limit Switch

The Goodman B1370193 is the factory high limit switch for the GDT070-3B gas furnace. Mounted on the heat-exchanger bulkhead, it is the primary overtemperature safety: if supply-air temperature rises above its factory trip point — typically from restricted airflow, a dirty filter, a failing blower, or a blocked duct — it opens the control circuit and shuts off the burners to protect the heat exchanger from overheating. Frequent limit trips are a warning sign that should never be bypassed.

Specifications

Part Number: B1370193
Type: Primary high limit switch
Reset: Automatic
Fits Model: Goodman GDT070-3B furnace
Function: Supply-air overtemperature cutout
Equipment: Gas furnace

OEM vs. Generic

This genuine OEM Goodman high limit is calibrated to the exact trip temperature and mounting footprint your furnace was engineered around. Generic replacements may carry different set points or bracket dimensions, risking nuisance trips or improper protection. Because the high limit guards the heat exchanger, we recommend the OEM part.

Installation Difficulty

Rating: Easy (1/5). Disconnect power, unplug the two spade terminals, remove the mounting screws, and install the new switch in the identical orientation on the heat-exchanger panel. Reconnect and restore power — usually a 10–15 minute job. If the furnace continues to trip the limit after replacement, address the underlying airflow restriction (replace the filter, open registers, check the blower) or call a licensed HVAC technician.

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 High Limit Switch fo...

$28.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT070-3B Furnace — B1370193?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT070-3B Furnace — B1370193. 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 GDT070-3B Furnace — B1370193?

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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