Black drive belt on white background
Black drive belt on white background

A34/4L360 HVAC V-Belt — Lennox 25P03 Cross

XPart Number XP10914613
$28
Available by special order
Buying Options: OEM Genuine

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Frequently Bought Together
BELT SLIPPING, SQUEALING OR WORN?

A34/4L360 HVAC V-Belt — Restores Blower Speed & Airflow

Wrapped A-section / 4L drive belt for compatible HVAC blowers, fans, pumps and equipment drives.

A34 / 4L36036" Outside Length1/2" Top Width40° Profile
Fitment rule: No manufacturer-published model-level list was verified. Match the complete A34/4L360 marking, 1/2-inch profile and 36-inch outside length—not equipment type alone.

Verified Cross-Reference Information

Industry NumbersA34, 4L360
Lennox / Browning25P03
Greenheck345039 / A34; 345063 / 4L360
Dimensional FHP EquivalentGates 6836 / 4L360K

Important: The Gates FHP number is a dimensional equivalent. Cover, cord and duty construction can differ from a wrapped classical belt.

Size & Application Data

Outside Length36" / 914 mm
Top Width1/2" / 12.7 mm
Nominal HeightApproximately 5/16" to 11/32", depending on product line
IncludedOne new wrapped drive belt

Common Problems This Belt May Correct

  • Startup squeal, chirp or belt slip
  • Weak airflow or a fan, blower or pump running slowly
  • Black belt dust around the sheaves
  • A cracked, glazed, stretched or frayed belt

Check Before Ordering

  • Read the complete number printed on the old belt.
  • Confirm the 1/2-inch A/4L profile and 36-inch outside length.
  • Inspect sheaves for worn or widened grooves.
  • Check alignment, bearing drag and belt tension.
Pro Tip: Correct worn sheaves, misalignment or failing bearings before installing the new belt.

Installation Notes

  1. Disconnect and lock out power.
  2. Release tension according to the service manual.
  3. Do not pry the belt over a pulley.
  4. Align sheaves and set specified tension.
  5. Rotate by hand, reinstall guards and test.

Frequently Asked Questions

Are A34 and 4L360 the same nominal size?
They are commonly dual-designated for this 1/2-inch, 36-inch outside-length size. Construction can still differ by product line.

✓ Model-Specific Repair Pages

Frigidaire 1 Dishwasher Parts & Repair Guide

What Customers Say

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