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Turns on & off..but, no heat. electric furnace Is there a RESET button on a Nordyne electric furnace?

Changed batteries in thermostat Changed Carling switch toggle fan switch Turned all breakers off and back on...

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Does the fan run normally? Or does it run all the time? If the fan operation is normal the problem may be a bad heat sequencers(relays) or the heat strip itself could be defective. Kill the high voltage grab a meter and disconnect the wires from the heat strip and ohm out the winding. If it's open then that's a problem. If it has a value ( probably low that's ok) then they should be good. Plug all wires back in. Move to the the heat sequencers look for any burnt wires. The low voltage should be blue and white wires maybe brown (second stage normally). This is the part that requires live testing of the system do not attempt if u are not familiar or comfortable with high voltage...be careful. With all wire plugged back in and the panels off turn on the high voltage. With the meter check for low voltage across the heat sequencers to should read 24+ volts across the blue and white. This would indicate a on switch. if on then check for the lead that come from the high voltage to the heat sequencers red wire usually. This wire is hot always. Check between the chassis and this lead for 120 vac. If u have the switch on and high voltage present there should be high voltage on the opposite terminal check with meter. In no voltage the sequencer is bad. Hope this helps. Oh if no low voltage check tstat wire (white) and then check the tstat for correct programming if digital.. you might do that step first btw

Posted on Jan 02, 2017

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With this thermostat, it may be flashing FAN because the HVAC (any heating or cooling unit) unit isn't working. In the winter, the pilot light for the heat may not be lit or the air intake/exhaust could be blocked. In the summer, the AC coils could be frozen or there may be another problem. Go to the HVAC unit and look for any lights at or near the control board. Check the outside unit for problems as well.

If there is no problem with the HVAC, try resetting the software in the thermostat. Use a bent paperclip to press the reset button above the Next button; the reset button is inside a small recessed spot. If the problem persists, try a different thermostat. If a different thermostat doesn't work, the HVAC system needs to be serviced.

I hope this helps. Please add a comment with the type of furnace you have (electric, gas, oil). That might help determine what issue you need to look for on the main unit.

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see this causes and fix it. God bless you
If the furnace won't run, check the electrical service panel for a blown fuse or tripped breaker. Also make sure the power switch on or near the furnace is turned on. Check the unit for a reset button and try it. Some units have a built-in breaker or fuse panel.
If there is not enough heat, raise the thermostat setting five degrees to see if it turns the unit on. If the unit still does not generate enough heat, check the comfort controls . Clean or replace a dirty filter, clean the blower assembly (see the Forced-Air Distribution Fix-It Guide), and make sure that all registers are open and not blocked.
If the furnace turns on and off repeatedly (cycles), clean or replace the filter; and clean the blower assembly (see Forced-Air Distribution Fix-It Guide).
If the furnace is noisy, make sure access panels are mounted and fastened securely; spray squeaking belts with fan-belt dressing and replace worn or damaged belts; adjust the blower belt; lubricate motor and blower oil ports.
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If the fan runs in the ON setting then you have a bad fan relay for the heat mode.
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