What are the specs for this Limit Switch?

The correct replacement for Goodman model DMS80904BNA — B1370188 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 DMS80904BNA — B1370188.

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 170°F Primary Limit Switch for DMS80904BNA — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for DMS80904BNA — B1370188
Brand: Goodman
SKU: GOODMAN-B1370188
Price: 22.95 USD
Availability: InStock

SKU: GOODMAN-B1370188 Brand: Goodman

$22.95 $29.95

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The Goodman B1370188 Primary Limit Switch is the OEM main high-limit control for the DMS80904BNA furnace and compatible Goodman/Amana models. Mounted on the heat-exchanger partition, this auto-reset switch opens at 170°F when supply-air temperature climbs too high, cutting the burners to prevent heat-exchanger overheating while the blower continues to purge residual heat.

Specifications

Trip temperature: 170°F (open on rise)
Reset type: Automatic reset
Contact configuration: Normally closed (N.C.)
Function: Primary high-limit safety control
Fits: Goodman/Amana DMS80904BNA and compatible furnaces
OEM part number: B1370188

OEM vs. Generic

The primary limit is the furnace's main overheat guardian, so trip accuracy matters. Our OEM switch is factory-matched for the 170°F set point and correct bracket fit. Generic units with a different trip temperature can cause nuisance shutdowns or, worse, allow the exchanger to overheat. We strongly recommend OEM for this control.

Installation Difficulty

Easy (1/5). Kill power at the breaker, photograph and transfer the two wire leads, remove the two mounting screws, and seat the new switch flush against the heat-exchanger panel. Around 10–15 minutes for a DIYer. Frequent tripping typically indicates low airflow or a cracked exchanger — inspect before repeated replacements.

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 ...

$22.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman DMS80904BNA — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman DMS80904BNA — B1370188. 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 DMS80904BNA — B1370188?

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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