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Robertshaw thermostat is blowing cold air when on heat and wont shut off

I have tried everything I can think of. I took out the batteries and hit the reset button and even set it to off. But the heater keeps blowing cold air and wont shut off. Please anyone, help.

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3 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

gargac
  • 39 Answers

SOURCE: Unless we set the thermostat

Check and make sure the filter is clean. This sounds like a restriction in the system. If the unit has central cooling make sure ther indoor evaporator coil is clean at the furance.The unit may be cycling the burners on and off at the high heat limit , fan/limit control. You can also eliminate the thermostst from the furance. Turn power off at the furnace and disconnect the wiring from the thermostat. Jumper the red and white wire together. Turn the furnace back on. The furance should run in the heating mode. Try this and see if the problem is still there.

Posted on Jan 27, 2011

heatman101
  • 43501 Answers

SOURCE: My gas heater keeps blowing

Hi,

Here is a tip that will help you try to figure out why your furnace is not working.

Basic Furnace or Heating System Troubleshooting

heatman101


Posted on Feb 03, 2011

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