checked oven, opened panel, noticed that the ignition blower motor is not running - checked voltage to motor, not getting 120v to motor. Called Middleby, was on hold for 20 min or more, spoke to Dennis to help me with troubleshooting. He had me check voltage to control terminal L2 to air switch getting 119v and per Dennis it's a bad air switch.. will order through shop and return unit not in service. 8/23/19 put in new pressure switch unit still did not heat up call the manufacturer twice two different texts keep telling me it's the pressure switches both Motors in the back are running both pressure switches are good because I checked them I blew through them lightly and they both have continuity but I am not getting any voltage to the ignition motor or coming out of the Transformer I blew through the lines of the blower motors in the back to see if they were clogged up but they're not I have exhausted my options will return with a more experienced technician next time unit still not