What are the specs for this Limit Switch?

The correct replacement for Goodman model WFM18140S5DNCB — 20162903 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 WFM18140S5DNCB — 20162903.

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 150°F Primary Limit Switch for WFM18140S5DNCB — 20162903

Name: OEM Goodman 150°F Primary Limit Switch for WFM18140S5DNCB — 20162903
Brand: Goodman
SKU: GOODMAN-14157
Price: 26.95 USD
Availability: InStock

SKU: GOODMAN-14157 Brand: Goodman

$26.95 $34.95

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Goodman 20162903 Primary Limit Switch (150°F)

The OEM 20162903 primary limit switch is the main high-temperature safety control for your Goodman WFM18140S5DNCB furnace. Mounted on the heat-exchanger bulkhead, it monitors supply-air temperature and opens the burner circuit if airflow is lost or temperatures exceed its 150°F trip point — protecting the heat exchanger from cracking and preventing overheating. Unlike the manual rollout switch, this auto-reset control re-closes once temperatures return to a safe range.

Specifications

Type: Primary high-limit switch, auto reset
Trip temperature: 150°F (open on rise)
Configuration: Normally closed
OEM Part Number: 20162903
Fits: Goodman WFM18140S5DNCB and compatible furnaces

OEM vs. Generic

Limit switches are defined by their exact trip temperature and mounting bracket geometry. The OEM Goodman 20162903 is set to the factory 150°F specification and drops directly into the original bracket. Generic substitutes with an approximate temperature rating can cause premature nuisance shutdowns or fail to protect the heat exchanger. OEM is the safe choice here.

Installation Difficulty

Easy (2/5). Cut power to the furnace, remove the two mounting screws, transfer the wire leads, and secure the new switch. Ensure the sensing element seats in the airstream as originally positioned. Typical repair time 10–15 minutes.

Frequent limit trips often indicate a dirty filter or blower problem — inspect airflow before assuming a failed switch. Fitment help: info@nationalhvacparts.com.

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 150°F Primary Limit ...

$26.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman WFM18140S5DNCB — 20162903?

Yes. This is the factory-specified OEM limit switch for the Goodman WFM18140S5DNCB — 20162903. 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 WFM18140S5DNCB — 20162903?

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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