Vermont Castings Radiance lp DV2600 pilot on; burner won't light

[triath2]

Hi all!

We have a10-12 year old VC Radiance DV2600 propane direct vent gas stove. Pilot lights fine; and until recently all worked well using the optionally equipped unit with 'on-off-thermostat' switch on back of stove that also has the rheostat for fan speed. A few days ago, stove failed to light when switch was set in the thermostat position; but would light and work in the 'on' position. Now, the stove will not light in either thermostat or on position; but the pilot remains lit normally. I have tried 'shorting' the two leads at the thermostat end - with no response. Ideas?

 

[DAKSY]

Do you have a multimeter? Check the thermopile readings by putting the meter's contacts on the TH-TP & TP terminals.
You should be getting 550+ millivolts with the burner off.
When your turn the burner on the millivolts should drop to around 200 or so.
Did you try jumping the TH-TP & the TH terminals with a wire to see if it will ignite?

 

[Fsappo]

On that exact model, back in the day, we had some bad toggle switches. I think I jumped at the switch to diagnose that as the issue (after doing what Daksy suggested and jumping the terminals on the valve to make sure it wasn't a valve issue) If I am recalling properly, I ended up buying a handful of switches from VC to keep in the truck.

 

[Heatsource]

if Bob's advice doesn't work,
did someone turn the on/off pilot knob to pilot?

 

[Fsappo]

Oh yeah, always look at the simplest things first, Dave. I forgot that step!

 

[Heatsource]

Yes, I always start with the simple questions! (and try not to offend people with the " is it plugged in" type questions)