Problem with electric baseboard heat...?

I assume you are talking about line voltage thermostats. Those are common in baseboard heaters. If so, the wires will be about the size of pencil leads.

The white wires are supposed to be grounded. The voltage from black to red is supposed to be 230 from red or black to white is 117. There may have been provisions for two stage heating. 115 v 0r 230v Just tie the white wires together and use the black and red wires. The white wires may have been to make indicator light work. It may just be that the electrician used three conductor cable which comes red, black, and white. Now there is a bare ground wire in addition. The white wire may have been to ground the system, no bare wire. whatever, just wire nut the white wires together. The other answerer is assuming the wires are smaller and low voltage control wires which will be about 24v. and real small.

in spite of you prefer to do, be careful!!!!!!!! each and every baseboard heater i've got ever labored on grow to be on a 220 Volt circuit. each and every might desire to be on a circuit of it extremely is very own. If the breakers are marked, then you are able to turn each and every off in turn, and consider the wiring in the back of the thermostat. If it extremely is all intact, and you at the instant are not genuine stable with electrical energy, you may desire to call a repairman. it extremely is low fee than a decision to the ambulance considering the fact which you acquire knocked out by potential of the voltage.