Fan and Limit Controllers
Match the full controller model and sensing-element insertion length before ordering.
| Exact model | Insertion length |
|---|---|
| L4064B2228 | 5 in (127 mm) |
| L4064B2236 | 8 in (203.2 mm) |
| L4064B2210/U | 11.5 in (292 mm) |
Measure from the mounting face to the sensing-element tip, not the overall assembly. These models are not confirmed interchangeable.
Each listing is for 1 controller. The shared 5 in and 8 in listing photo shows an L4064B2210 label; it is a series reference, not an exact-model photograph. Check availability on the individual listing.
Get a model check · Manufacturer selection guide (page 35) · Browse switches
What information helps confirm a replacement?
Send a clear photo of the complete old-controller label, a ruler photo showing insertion length from the mounting face to the sensing-element tip, the furnace brand and model label, and clear terminal/wiring photos. An overall assembly measurement or a similar-looking case does not establish compatibility. A qualified heating technician must verify the full model, mounting, wiring, electrical ratings and temperature settings against the equipment requirements before installation.
Availability and dispatch timing must be confirmed for the selected model; a family comparison is not a stock or delivery guarantee.
