No heat and cooling fan cycling.

[Rararat]

My Jenn-Air double oven produces no heat in either oven though the control panel shows normal function ( the setting of cook temp. and indication of preheat) the cooling fan cycles on and off possibly because of the lack of heat.

Model JJW9639CAW

[Repair-man]

If you can open the control panel and check your voltage coming into the oven there at the black and red wires to verify that you  have 240 volts, then the problem is a bad relay board. Since you say it produces no fault codes (such as F-3 for a bad sensor) we can conclude that it is a voltage problem, either with your house wiring or in the oven relay board where hi-voltage switching takes place. Start by completely re-setting the breaker to the oven, turn it all the way off then back on...