Description
The Lennox 69W37 is an OEM replacement high limit control designed to protect your furnace from overheating and potential heat exchanger damage. Identified by model designation L165-30F, this limit control monitors supply air or heat exchanger temperatures and automatically interrupts the burner circuit when unsafe temperatures are detected, then resets once conditions return to a safe operating range.
How It Works
The L165-30F designation defines the control’s operating parameters: the device opens (trips) at 165°F and features a 30°F fixed differential, meaning it automatically resets at approximately 135°F. This automatic reset action restores normal furnace operation once the temperature drops back into the safe range, eliminating the need for manual intervention during normal nuisance trips.
Key Features
- OEM Lennox replacement part — SKU 69W37
- Model designation: L165-30F
- Opens (trips) at 165°F to protect against overheating
- 30°F fixed differential — resets at approximately 135°F
- Automatic reset operation for reliable, hands-free recovery
- Designed to interrupt the burner circuit upon high-temperature detection
- Protects the heat exchanger and downstream components from thermal damage
- Direct OEM replacement for compatible Lennox furnace models
Application
This limit control is a direct OEM replacement part for compatible Lennox furnace systems. It is commonly installed in the supply air plenum or on the heat exchanger to monitor operating temperatures. Always consult your equipment’s service manual or parts list to confirm compatibility before installation.
Why Choose an OEM Replacement?
Using a genuine Lennox replacement limit control ensures proper calibration, reliable trip and reset performance, and continued system safety. Aftermarket substitutes may not meet the precise temperature specifications required for safe furnace operation.
Reviews
There are no reviews yet.