I want to replace my existing baseboard heater thermostat. I have new
one (Honeywell RLV 450) but it only has two wires for connections and
the old one has 4 wire hookup. What wires are used (there are two red
and two black wires)?
Is this a 240VAC baseboard? sounds like you might have got a
thermostat for 120VAC that only breaks one leg of the wiring. Not
sure if it's code compliant to do that with 240VAC or not but I'm
pretty sure that remembering back to messing with my parents' house,
the thermostats in each room were double pole.
*You can use a single pole thermostat for a two pole installation on a
baseboard heater. I prefer not to do it that way for safety reasons. When
the thermostat is off one leg on the heater will always have juice on it.
What you need to do is splice one hot leg and one load wire together. Than
just follow the instructions for line and load on the new thermostat.
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