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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8165
Experience:  Furnace, A/C and heat pump specialist.
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Im trying to determine where my O wire goes on my Honeywell

Customer Question

Im trying to determine where my O wire goes on my Honeywell Lyric T5 thermostat ?
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: My thermostat had 6 wires and the new one doesnt have a place to put my final O wire
JA: Do you plan on doing the work yourself?
Customer: Yes im done other than knowing what to do to the O wire
JA: Anything else we should know to help you best?
Customer: No
Submitted: 8 months ago.
Category: HVAC
Expert:  airheatman replied 8 months ago.

Your O wire will go into the O/B W terminal.This controls reversing valve in outdoor unit.

Expert:  airheatman replied 8 months ago.

Also remember to set the slider switch T R or R and RC depending on whether you had only one R wire or two.

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