Modine 3H0400780003 L220-40F Limit Switch Overview
The Modine 3H0400780003 is a genuine OEM replacement L220-40F limit switch designed for use in Modine unit heaters and heating equipment. This high-limit safety control is a critical component that protects your heating system from dangerous overtemperature conditions, ensuring safe and reliable operation season after season.
How It Works
The L220-40F designation indicates this limit switch opens (trips) at 220°F to interrupt the burner circuit when excessive heat is detected, and resets automatically once the temperature drops by 40°F (closing at approximately 180°F). This automatic reset function helps restore normal operation once safe temperatures are re-established, minimizing downtime in commercial and industrial heating applications.
Key Features
- Genuine Modine OEM replacement part — ensures proper fit and function
- High-limit trip point: 220°F
- Automatic reset differential: 40°F (resets at approximately 180°F)
- Designed to interrupt burner operation upon overtemperature detection
- Compatible with Modine unit heaters and heating systems
- Helps protect heat exchangers and equipment from thermal damage
- Direct OEM replacement for simplified installation
Application
This limit switch is a direct OEM replacement part for select Modine gas-fired unit heaters used in commercial, industrial, and warehouse heating applications. Always verify compatibility with your specific Modine model before ordering.
Why Choose OEM Replacement Parts?
Using genuine Modine replacement components ensures your equipment operates within designed safety parameters, maintains warranty compliance, and delivers the reliable performance your facility demands.
