If the pilot light will not stay lit

or for new installations requiring specific actuator pairings

The board supports both 24VAC and 115VAC intercepted calls

which prevents electrode fouling and tank corrosion

it provides reliable shifting without the need for a minimum pressure differential

Markel 29157004 Limit R-410A If the pilot light willThe Markel 29157004 Limit is a mission critical high limit safety switch designed for precision thermal protection in HVACR systems. Specifically engineered for duct heaters and electric heat assemblies, this manual reset limit prevents catastrophic equipment failure by breaking the electrical circuit when internal plenum temperatures exceed safe thresholds. Identified by the technical designation MFHE LIMIT RD103 002 104C, this component triggers at