Freeze Stat - GRAA Updated January 29, 2026 15:58 GRAA The freezestat has a temperature and time dial on it. Adjust the time and temperature if needed. Sensing element should be located as far downstream as possible from the heat exchanger. 4457_C - TEMPERATURE CONTROLLER & TIMER, FREEZESTAT, TCT PDF Articles in this section DX cooling option with A2L sensor- GRAA Sterling unit GRAA Heat exchanger removal Freeze Stat - GRAA Horizontal/Vertical Combustion Air Inlet Kit VFD- Lenze Drive information Maxitrol SC11 - 0-10 VDC controller for GRAA Indoor Duct Furnace/ Vent piping- GL, GG or GZ High limit and safety limit function - GRAA or Rooftop Sterling Heaters OD Air control with Siemens Controller RDG400 Minimum Position Function Modulation Valve Pressure Adjustment Procedure See more Related articles Evaporator Defrost Control LCU ReliaTel RTRM LED2 Diagnostic Testing Tracer TD-5 Display for ReliaTel Controller Manual Dirty Sock Syndrome Gas pressure requirements for the GRAA and GSAA