Tempstar Furnace Won T Ignite

To determine if the igniter is faulty remove the igniter and inspect. This is typically the problem if you can hear your furnace click on but it does not fire up. The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite.

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The igniter gets very hot and glows bright orange to light the gas burner.

Tempstar furnace won t ignite.

Answered by a verified hvac technician. If the igniter fails or cracks the furnace won t heat. If you have hot surface ignition the ignitor may be broke. Remove the front panel and look for the ignitor sensor.

Take the aluminium pilot tube off the gas valve start up and see if gas actually comes out of the pilot fitting and if you have 24v on the 2 blue wires the igniter may be bad that should cause the mini igniter to glow when it gets 24v. Refer to your user manual to locate the ignitor. Check that the thermostat has power to it if your furnace won t turn on. It is usually located near where the flames shoot out of the burners.

Check that the thermostat is on. If the igniter is not cracked use a multimeter to test the igniter for continuity. If the igniter is cracked replace it. If any of these things aren t right you won t get ignition.

To fix the furnace that won t start turn off the power to the furnace and turn off the gas. Ignitor won t light tempstar nug5125bkb1 gas furnace. If it s an intermittent pilot system there may be other things going on to where no ignition sequence is taking place. Check that the thermostat is in the heating mode of operation.

A faulty or dirty ignition or sensor is a relatively easy fix so follow these steps and you may be able to solve the problem yourself. It kicks on repeatedly but won t ignite. Set the temperature you would like for test purposes just set about 10 degrees hotter than the current temperature to see if the furnace turns on.