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I wanted to replace an old 2-pole electric baseboard thermostat with a new one. However, when I pulled out the thermostat I was confused by the way it is wired (see photo - both red wires connected to each other, and both black wires connected to each other). It appears as if it is wired as a 1-pole thermostat would be. Can anyone explain why it might be wired this way? I don't want to hook up my new digital thermostat the same way if it may damage it. Note that in the photo I had already removed the ground connection.

2-pole thermostat with odd wiring

  • Your suspicion appears to be correct, it appears to be wired Single Pole. – Tyson Oct 14 '16 at 3:30
  • Years ago it was leagal to break 1 side of 240 lines, this did create a possible hazard since the other side of the circuit was still hot. Today double pole thermostats and controllers are the standard for safety. – Ed Beal Oct 14 '16 at 3:45
  • I know for sure at least one other is wired this way, but I'll bet all 5 thermostats in the condo are wired this way. Looks like I need to figure out which wires are what in the box, and re-wire it the right way. – mangoMan Oct 14 '16 at 3:58

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