Ge gas cooktop

[a300busdriver]

I have a GE gass cooktop with downdraft vent.  I have 2 problems.

1.  The vent fan comes on automatically with one of the left burners turned on, but not every time just sporadically.  Is the fan supposed to come on with the left burners?  If so why is it sporadic?  loose wire?  The manual on/off switch for the vent fan on the contol panel works fine.

2.  The igniters fire off with a click every 10-15 seconds even when all 4 gas knobs are in the off position.  The igniters work fine when i turn a gas control knob to the lite position.

Thanks for the help

Model jgp389bev1bb

[JWWebster]

Must be 2 wires rubbing somewhere.

[Repair-man]

The fan problem on the left side usually turns out to be a loose connection where the drip pan sits. The pan has a small tab that prevents the fan from running when the pan is in place for normal cooking. When the pan is removed, such as to use the griddle feature, the fan will automatically come on when the left controls are activated. Perhaps the little switch in front is not being sensed by the tab on the pan. Sometimes you can slide the pan forward enough to shut the fan off to test this.

The ignitor sparking randomly every few seconds is a bad spark module. Be sure that the polarity to this unit is correct and that the circuit is NOTon a GFCI