Tekmar Controls 521 Thermostat 318172-701 While designed as an OEM

While designed as an OEM Rheem-Ruud part

effectively reducing vibrational harmonics that can lead to premature motor failure

Common Technical Questions What is the LRA rating for the ZR44K5E-PFV-800

two flashes indicate a pressure switch fault

Tekmar Controls 521 Thermostat 318172-701 While designed as an OEMThe Tekmar 521 Programmable Thermostat is a versatile microprocessor based control designed for precise single stage heating, two stage heating with fan, or one stage heating one stage cooling applications. Engineered for 24V AC DC systems, this unit supports hydronic radiant floor heating, baseboard convection, and forced air systems. The 7 day programmable schedule allows for four distinct events per day, optimizing energy cycles without