[MWYDILA]

I am replacing the baystat239a t-stat with a programmable honeywell th6220d for my heat pump with aux heat, want to be sure of correct wire hook up

[wmproop]

be sure to tag each colored wire as you take it off
example=red to r
=white to w
=green to g
this is very important
then the install instructions for the honewell should guide you

almost forgot,, be sure to kill the power at breaker to the furnace before starting

[MWYDILA]

Thanks, programing the t-stat for the type of system (2heat/1cool) was a bit challenging, but once it was completed, it seems to be online and pumping cool air.