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What are the signs that a York secondary heat exchanger needs replacement
Check for physical cracks in the ceramic and verify the spark gap
but the secondary side fails to show 24VAC across the R and C wires
and necessary sensors to ensure a complete and reliable field repair
ClimateMaster AWC99U01 Thermostat R-407A What are the signs thatThe ClimateMaster AWC99U01 Thermostat is the engineered direct replacement for ATC32U03, providing high precision control for advanced geothermal and water source heat pump applications. This communicating thermostat integrates seamlessly with ClimateMaster DXM2 boards, allowing technicians to access critical diagnostic data and system performance metrics directly from the interface. Operating on 24 VAC 10% @ 3 VA, it features 802. 11 a b g n Wi Fi