Markel RK120EAA Wall Thermostat 319825-402 This board is specifically designed

This board is specifically designed for certain series within the Friedrich product line

the 626513R limit switch may have failed open or is tripping due to restricted airflow

95 kPa) and can withstand surges up to 25 psig (172

Using it with non-compatible equipment may lead to communication faults or electrical mismatches

Markel RK120EAA Wall Thermostat 319825-402 This board is specifically designedThe Markel RK120EAA Wall Thermostat is a professional grade low voltage heat only thermostat engineered for precise climate control in commercial and industrial environments. This analog wall mounted thermostat is highly versatile, supporting both 24VAC and millivolt systems, making it a reliable choice for retrofitting older equipment or installing new fan forced unit heaters. It features sealed contacts for enhanced longevity in demanding conditions