I've got Whirlpool propane oven in a rent house that will not ignite unless the power is unplugged and plugged back in. Last time it worked for about a month before happening again. The glow igniter comes on but no propane is released. If I unplug and plug back in it works fine. Would this be a bad safety value or something electrical in the oven?

The oven is a basic unit. Has the 5 knobs up front. No digital controls. I believe the oven is around 5 years old.

Thanks.