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Discussion Starter · #1 ·
Hello all! New to the site and first time poster.... I have a house that has six base board heaters with the thermostats that have a twist knob to control them. (thermostat is by the door and not on the heater). The original wiring in the house has 3 heaters feed off the same two pole 30 amp breaker. (jumps are made in the thermostat boxes).. Heres the problem....I have 240v coming into the thermostat box. At the heater when I break apart the connections and test the voltage I get 120 on each leg when reading ground to hot on the separate legs. When I try and read both legs together to show 240 it doesnt show any voltage....Ive seen this before but its been so long I cant remember what the cause is.....any help would be awesome... Thanks all love the site.
 

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Bad thermostat. Or broken wire. Maybe a varmit chewed thru it? :blink:
 

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Hello all! New to the site and first time poster.... I have a house that has six base board heaters with the thermostats that have a twist knob to control them. (thermostat is by the door and not on the heater). The original wiring in the house has 3 heaters feed off the same two pole 30 amp breaker. (jumps are made in the thermostat boxes).. Heres the problem....I have 240v coming into the thermostat box. At the heater when I break apart the connections and test the voltage I get 120 on each leg when reading ground to hot on the separate legs. When I try and read both legs together to show 240 it doesnt show any voltage....Ive seen this before but its been so long I cant remember what the cause is.....any help would be awesome... Thanks all love the site.
Welcome to the forum:)
 

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Discussion Starter · #4 ·
I was considering trying a different thermostat. Sorry for not posting more info....Im an electrician in NC. Thanks
 

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I was considering trying a different thermostat. Sorry for not posting more info....Im an electrician in NC. Thanks
Sounds like there are splices in the T-stat Box and they're mixed up so that your getting voltage from the same phase to ground.
 

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Discussion Starter · #8 ·
That was my thoughts exactly...im heading there this morning to go through it. Ill let you guys know what I find.
 

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Neurotopsy said:
That was my thoughts exactly...im heading there this morning to go through it. Ill let you guys know what I find.
You must disconnect the heater to read voltage at it. Other wise you are just reading the same voltage in a 240 volt circuit. So take both wires off the baseboard, read voltage there. Then read the resistance of the baseboard for good measure.
 

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Discussion Starter · #14 ·
Yup splice at the thermostats.....and a buried thermostat in the wall....and when I say buried I mean the sheetrock contractor left it in the box and covered over it. Thanks for the input.
 
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