Answer Gary, You will need to test the thermostats on the unit to make sure that they have continuity. If there is no continuity then it will need to be replaced. If the thermostats check ok then check to see if the igniter is coming on and test for voltage of 120 vac getting to the igniter. If there is power to the igniter but does not come on then the igniter would need to be replaced. Read More... Answered by AppliancePartsPros.com | Tuesday, August 25, 2015