Signature Command / Monessan issue

[Tunateaser]

I have a Monessen BLDV7 series DV NG fireplace which is 10 years old and uses a signature command system. Recently the gas valve opens and the burner lights but then the valve immediately closes, the flame goes out and the system beeps at the same time as well as a few seconds after the burner goes out. Attached is a video of the problem This was an intermittent problem but has now become permanent. I have checked the grounds. Flame adjustment motor etc.

Ant help will be greatly appreciated.
Eric

 

[Fingerlakes Fireplace]

Install a new pilot assembly.

 

[Tunateaser]

Install a new pilot assembly.

Thank you that was going to be my next move. However, I was making a few electronic tests and cleaning terminals. After that nothing worked. not even a click. I said screw it for tonight I'll try again some other day and shoved everything back under the fire place. Presto, now it works. There is defiantly a lose or corroded terminal somewhere.

 

[Fingerlakes Fireplace]

I have seen that on this system. Very hard to find as the fault is in the connectors.
Set your dmm to ohms and test the resistance of each wire, when everything is plugged in.

Wether or not the pilot is a part of the problem, you will have to replace it soon.
The flame sensor is almost rotted away..

 

[Tunateaser]

I have seen that on this system. Very hard to find as the fault is in the connectors.
Set your dmm to ohms and test the resistance of each wire, when everything is plugged in.

Wether or not the pilot is a part of the problem, you will have to replace it soon.
The flame sensor is almost rotted away..

Thank You, The sensor is a bit concave. I will replace it.