I've replaced the line-voltage thermostat with a new programmable one
(Honeywell LineVolt Pro 8000). During installation, I discovered that
I did not have enough wires coming from the wall to match the four
wires coming from the thermostat (L1, L2, and two Load wires). I
therefore did not connect one of the Load wires. (See diagram at
Is it okay that I did not connect one of these wires? If it's not
okay, I'd appreciate some guidance on what to do given the wires that
I have available.
Yes, you're right about my previous thermostat being single pole.
Regarding the splicing: There are two white wires spliced together and
both have black electrical tape on the ends. I understand that this is
an indication that they're recoded. Does that modify your advice at
If not, and I have to unsplice as you recommend, how do I know which
one is Line and which is Load?
Once you separate the four wires, you will notice there are two separate
cables. Turn the breaker back on, and with a tester, see which cable gives
you 240 volts across it's two wires. Once determined, kill the power and
attach those two to the "line" and the other two to the "load"
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