DIY Home Improvement Forum banner

thermostat help!!!

789 Views 4 Replies 5 Participants Last post by  HVAC1000
how to wire the thermostat two wires to furnace four wires
1 - 5 of 5 Posts
Assuming your google-search-like post means that the new thermostat has two wires and there are four wires coming from the furnace for the old stat, and that you have a gas forced air furnace, I would say hook up R and W to the new stat, and disconnect the other two wires at the furnace. If this doesn't help, help us help you by posting more info.
Do you have whole house A/C ?

This may account for the 4 wires you say are coming from your furnace/
What is the new thermostat? Some of the fancy new ones only use two wires to communicate with an at unit board which then tells the furnace what to do. Or you may have a high voltage thermostat which only uses two wires.
1 - 5 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.