What HP motor do I need for my Lennox unit?

The correct replacement for Lennox model OEM Lennox Oil Burner Motor — Y5638 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 Lennox equipment which lists the model number OEM Lennox Oil Burner Motor — Y5638.

My AC fan is not spinning. What part do I need?

A fan that does not spin, spins slowly, or makes grinding or squealing noises needs a new motor. Grinding means the bearings have failed. Squealing means the bearings are dry. No spin with a humming sound means the capacitor may be the issue. Check the motor capacitor before replacing the entire motor.

Lennox

OEM Lennox Oil Burner Motor — Y5638

Name: OEM Lennox Oil Burner Motor — Y5638
Brand: Lennox
SKU: LNX-Y5638
Price: 99.95 USD
Availability: InStock

SKU: LNX-Y5638 Brand: Lennox

$99.95 $139.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

The Lennox Y5638 Oil Burner Motor is a genuine OEM replacement motor for oil-fired cast iron boiler applications. This motor drives the burner's combustion air blower and fuel pump, delivering the air and atomized oil needed for a clean, efficient burn. Consistent motor speed and torque are essential for reliable ignition and steady flame throughout each firing cycle.

A failing oil burner motor commonly announces itself with hard or no starting, humming without spinning, grinding or squealing bearings, overheating, intermittent lockouts on the primary control, or a burner that trips shortly after firing. Worn bearings or a weak winding can also cause poor atomization, sooting, and reduced heat output — signs the motor can no longer maintain rated performance.

Installing the OEM Y5638 guarantees the correct horsepower, RPM, rotation, shaft, and mounting to match your Lennox oil burner assembly, so the pump and air handling work as the system was engineered. Aftermarket substitutes can differ in speed or frame and compromise combustion and safety. Confirm the part number and burner model before installation for a precise, dependable fit.

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 Lennox Oil Burner Motor — Y5638

$99.95

Frequently Asked Questions

Does this Motor fit my Lennox OEM Lennox Oil Burner Motor — Y5638?

Yes. This is the factory-specified OEM motor for the Lennox OEM Lennox Oil Burner Motor — Y5638. 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 motor on my Lennox OEM Lennox Oil Burner Motor — Y5638?

Difficulty: Medium-Hard (1–2 hrs)
Step 1: Turn off breaker. Step 2: Note motor specs: HP, RPM, voltage, rotation direction. Step 3: Remove old motor from mounting. Step 4: Transfer fan blade to new motor. Step 5: Mount new motor, reconnect wiring. Step 6: Restore power, verify rotation direction.

My AC fan isn’t spinning. What part do I need?

Fan not spinning, spinning slowly, or making grinding/squealing noises = motor failure. Grinding = bearings failed. Squealing = bearings dry. No spin + hum = check the motor capacitor first before replacing the entire motor.

Is this motor compatible with Bryant or Payne too?

Many Lennox 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 Lennox motor?

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

OEM Lennox Oil Burner Motor — Y5638

Shipping Information

Return Policy

Frequently Asked Questions