Suddenly, no spark to any of the burners. From looking at the diagram, it appears to me that the problem is with either the “valve switch” , also called the “interlock switch”, or with the spark module. What tests can I do to determine what part has failed?
The first thing I would do is check for 120 VAC to the unit.
If there is nothing wrong with the power supply and no one burner sparks, most likely the problem is a bad spark module.
- The spark module AP4016930
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Gene.