I have two baseboard heaters that are 5ft long and run on the dial on the heater itself. I bought a themostat to replace the onboard one. The thermostat has two red wires and two black ones. I wired it up by the directions on the package. Heaters are dont seem to be working right is there a specail way to wire up the two rads so that I can use my new wall mounted thermostat. Ideas will be thanked.