Tempstar Furnace Won T Ignite

Ignitor won t light tempstar nug5125bkb1 gas furnace.

Tempstar furnace won t ignite.

This is typically the problem if you can hear your furnace click on but it does not fire up. If you have hot surface ignition the ignitor may be broke. Check that the thermostat has power to it if your furnace won t turn on. Answered by a verified hvac technician.

The igniter gets very hot and glows bright orange to light the gas burner. If the igniter fails or cracks the furnace won t heat. To fix the furnace that won t start turn off the power to the furnace and turn off the gas. If any of these things aren t right you won t get ignition.

Check that the thermostat is in the heating mode of operation. 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. If the igniter is cracked replace it. Remove the front panel and look for the ignitor sensor.

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. 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 on. 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.

The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite. It kicks on repeatedly but won t ignite. To determine if the igniter is faulty remove the igniter and inspect.