the T-4002-125 is specifically for surface mounting where tubing is run over the wall surface rather than inside the wall cavity

This SPDT pilot relay includes a built-in LED indicator for immediate visual confirmation of relay status

Inspect for a dirty air filter

Can I bypass the manual reset for testing

White-Rodgers F29-0225 Thermostat Guard the T-4002-125 is specifically forThe White Rodgers F29 0225 is a heavy duty clear plastic thermostat guard engineered to prevent unauthorized tampering and physical damage in high traffic environments like schools, offices, and churches. This model features a tamper resistant design with an integrated lock and key system, providing a secure barrier for your climate control settings. The solid base construction is specifically optimized for a quick, secure footprint when mounting over