Description
Lennox 75M31 Limit Control Overview
The Lennox 75M31 Limit Control is an OEM replacement safety device engineered to protect your Lennox heating system from dangerous overheating conditions. When the heat exchanger or supply air temperature exceeds a safe threshold, this limit control automatically interrupts the burner circuit, preventing equipment damage, heat exchanger failure, and potential fire hazards. Once temperatures return to a safe operating range, the control resets to restore normal furnace operation.
Key Features
- OEM Lennox replacement part — ensures proper fit and function in compatible Lennox furnace models
- High-limit safety shutoff — automatically cuts burner operation when temperatures exceed safe levels
- Automatic or manual reset functionality — provides reliable protection and easy serviceability
- Durable construction — built to withstand the demanding thermal environment inside a furnace cabinet
- Direct replacement — minimizes downtime with a drop-in fit for applicable Lennox equipment
Why Limit Controls Matter
A properly functioning limit control is one of the most critical safety components in any forced-air heating system. It guards against overheating caused by restricted airflow, dirty filters, blocked registers, or blower motor failures. Replacing a faulty limit control promptly restores safe operation and protects the heat exchanger — one of the most expensive components in a furnace.
Application
- Designed for use in compatible Lennox furnaces and heating systems
- Ideal for HVAC technicians performing maintenance, diagnostics, or component replacement
- Suitable for residential and light commercial heating applications
Ordering Information
- Brand: Lennox
- Part Number / SKU: 75M31
- Component Type: Limit Control (High-Limit Switch)
Reviews
There are no reviews yet.