Question about Goodman GMS90703BXA Heater
Need step by step on installing a thermastat to a two stage heating and cooling unit. I have installed a five wire line, or do i need more lines.
You need a 7 conductor minimum, 8 will suffice.
Depending on what type of thermostat you are using, hard wired or battery will make a difference, some model thermostats have a "C" on the terminal strip regardless of the power being supplied to the thermostat. If your Thermostat does NOT have a "C", and the furnace does not require a common, then disregard that terminal.
The Terminal strip on the thermostat and the terminal board on the furnace should be close to this, and let’s assume you have 2 stages of cooling as well. This is a general rule of thumb for the wiring and their correct place.
R - 24VAC
W - Heat
Y - Cooling
W1- Stage 2 Heat
Y1 - Stage 2 Cooling
C - Common
Posted on Dec 02, 2008
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Posted on Jan 02, 2017
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