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.
Tempstar furnace won t ignite.
Check that the thermostat is on.
The igniter gets very hot and glows bright orange to light the gas burner.
It is usually located near where the flames shoot out of the burners.
If the igniter is cracked replace it.
Answered by a verified hvac technician.
Remove the front panel and look for the ignitor sensor.
Refer to your user manual to locate the ignitor.
If the igniter fails or cracks the furnace won t heat.
Ignitor won t light tempstar nug5125bkb1 gas furnace.
Check that the thermostat has power to it if your furnace won t turn on.
To determine if the igniter is faulty remove the igniter and inspect.
If any of these things aren t right you won t get ignition.
If the igniter is not cracked use a multimeter to test the igniter for continuity.
This is typically the problem if you can hear your furnace click on but it does not fire up.
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.
To fix the furnace that won t start turn off the power to the furnace and turn off the gas.
Check that the thermostat is in the heating mode of operation.
If it s an intermittent pilot system there may be other things going on to where no ignition sequence is taking place.
It kicks on repeatedly but won t ignite.