What are the specs for this Limit Switch?

The correct replacement for Payne model Model PF1MNA018000AAAA 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 Payne equipment which lists the model number Model PF1MNA018000AAAA.

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.

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Payne

Payne Limit Switch HH19ZA955 for Model PF1MNA018000AAAA

Name: Payne Limit Switch HH19ZA955 for Model PF1MNA018000AAAA
Brand: Payne
SKU: PAYNE-PF1MNA018000AAAA-HH19ZA955
Price: 44.95 USD
Availability: InStock

SKU: PAYNE-PF1MNA018000AAAA-HH19ZA955 Brand: Payne

$44.95

Market price $52.88

SAVE $7.93 (15%) vs market

Genuine Payne OEM part · Guaranteed to fit your unit

✓ Guaranteed to fit PF1MNA018000AAAA — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Genuine OEM Payne limit switch, part HH19ZA955 — the factory-exact replacement for the PF1MNA018000AAAA. Fitment guaranteed — free returns if it doesn't fit.

Specifications

Setpoint	155/100 F
Reset	auto
Action	opens on rise (low-temp auto-reset limit)
Type	auto-reset limit switch
Xref	Therm-O-Disc 60T series; sibling HH19ZA950 = L150-55 (150F open / 95F close)
Note	Sold as '100-155F Auto Limit Switch'; 55F differential matches HH19ZA9xx family (950=150/95, 955=155/100).
OEM Part Number	HH19ZA955
Brand	Payne
Condition	New — genuine OEM

Symptoms of a failing limit switch

Watch for: The unit fails to complete its normal cycle, visible wear, corrosion, or heat damage on the part, intermittent operation that worsens. Catching it early protects the components around it.

Replacement guide

Swap the part, torque fasteners evenly, and route wires away from hot or moving surfaces. Run a complete cycle and verify normal operation before closing the panel.

FAQ

Is this the exact OEM part for my PF1MNA018000AAAA? Yes — verified factory fitment for that model.

Not sure of your model? Chat with Mike with the number from your unit's nameplate and we'll confirm before you order.

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 $99
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

Payne Limit Switch HH19ZA955 for...

$44.95

Frequently Asked Questions

Does this Limit Switch fit my Payne Model PF1MNA018000AAAA?

Yes. This is the factory-specified OEM limit switch for the Payne Model PF1MNA018000AAAA. 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 Payne Model PF1MNA018000AAAA?

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 Payne 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 Payne 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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