Pilot light wont stay lit...Circuit problems?

Hello everyone,


I am working on a ventless gas stove in my living room. We have had it for about a decade now and it works great! Well worked great.

Last year it stopped working because the pilot light assembly wouldn't stay lit. I replaced the thermocouple and the pilot assembly (I had no choice)

It fired right up and ran fine for another year. It has ran for about a month so far this winter but the pilot light has gone out on me twice. It was pretty stubborn to get lit again but I always managed to light it. This time, she's not coming back on. Here are a few more specifics

To light
_Press and hold, If you hold all the way down the electronic sparker lights the pilot. This unit works fine and consistently sparks over and over.

You have to hold the button down for a minute until the thermocouple warms up then you let go of the button and the pilot light should stay lit. Mine does not. I assume it's the thermocouple acting up again. I grabbed my DMM and measured the voltage difference between the two unplugged thermocouple wires (I unplugged them to measure) It starts at 0 and raises consistently to .5~.6 volts in about a minute. I don't have a wiring diagram but this seems to me like this thermocouple is working.

I don't know what I should check next. The pilot if very strong when you hold the button down to light it manually so I don't think we have a problem with the gas lines or anything like that. The electronic system isn't sensing the thermocouple right and it's shutting off the valve once I let go of the button for the pilot. The connections are all very very clean so corrosion is a non issue. I'm almost stumped.

It's a Monnesen stove, like this model.

http://www.google.com/imgres?um=1&h...141&start=0&ndsp=13&ved=1t:429,r:10,s:0,i:118

Thanks for the help! Sorry for such a detailed description I don't think I could accurately describe the issue without being so descriptive.