Rich I own a Thermador Range (Model RDSS30) where the Front Left XLO Burner does not work but the Rear Left XLO Burner works fine. I get spark to the burner but no gas so assuming I need a new Potentiometer for the front left only as the rear left works fine. The Gas Simmer Controller model is SQ003-H but does not have an A or B suffix after the H like I have seen in the Thermador Service Bulletins or on-line. Can I purchase the #422748 Potentiometer and have it work with my current Simmer Controller?
Answer Rich, You will want to check the gas coil to make sure that it is getting power and is not bad. If this checks ok then the issue will be the potentiometer and 00422748 will be correct for your unit. Read More... Answered by AppliancePartsPros.com | Friday, January 19, 2018