What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS80704BXAA — 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 AMS80704BXAA — 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.

IMAGE COMING SOON

Goodman

OEM Goodman 170°F Primary Limit Switch for AMS80704BXAA — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for AMS80704BXAA — B1370188
Brand: Goodman
SKU: GOODMAN-6946
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-6946 Brand: Goodman

$12.95 $16.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Genuine Goodman B1370188 Primary Limit Switch (170°F)

The Goodman B1370188 is the OEM primary high-limit switch for AMS80704BXAA gas furnaces and matching Amana 80% AFUE models. Mounted on the heat exchanger bulkhead, it continuously monitors supply-air temperature and opens the burner circuit at 170°F if the furnace overheats — typically from restricted airflow, a dirty filter, or a failing blower. It is the furnace's front-line overheat protection.

Specifications

Type: Primary high-limit switch
Trip point: 170°F (open on rise)
Reset: Automatic
Contacts: Normally closed (SPST)
Mount: Panel/bulkhead mount, OEM bracket pattern
Fits: AMS80704BXAA and Goodman/Amana 80% furnaces

OEM vs. Generic

The genuine OEM Goodman B1370188 is factory-calibrated to 170°F with the correct disc diameter and insertion depth for your heat exchanger. Generic replacements frequently use a slightly different sensing-tube length, which changes the effective trip temperature and can trigger repeated safety lockouts. OEM eliminates that guesswork and keeps your warranty intact.

Installation Difficulty

Easy (1/5). Roughly 15 minutes: cut power, pull the two spade connectors, remove the mounting screws, and install the replacement in the same orientation. No gas or refrigerant work involved. Before replacing, confirm airflow is unobstructed — a repeatedly tripping primary limit is usually a symptom of a clogged filter or weak blower, not a bad switch.

Genuine Goodman reliability, ready to ship. Need help confirming fit? Email 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 170°F Primary Limit ...

$12.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMS80704BXAA — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS80704BXAA — 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 AMS80704BXAA — 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.

Menu