Heatnglo SL-950th-dsi won't ignite

[Beach Dougie]

I have an older Heatnglo SL-950TR-DSI gas fireplace. Pilot lights easily. When i turn on with wall switch it won;t fire up.

Questions
1) The is a loose black wire with flat conntector from TH (thermostat) screw. where does this connect? I traced and can't figure it out.

2)Could it be thermocouple issue?

Thanks for any advice

 

[DAKSY]

Please post a pic of the valve & the pilot assembly.

 

[Beach Dougie]

Bob: In advance thanks for your help

 

[DAKSY]

Try jumping the two terminals on the terminal block labeled TH & TH-TP with a small wire or a paper clip, after the pilot is lit.

 

[Beach Dougie]

is this a test or permanent

 

[DAKSY]

Test. Let’s see if it fires up. If it does either the switch or the wiring may be bad. If it doesn’t, we’ll look elsewhere.

 

[Beach Dougie]

just tried it, Nada.

i have replaced all wall switches in my house. i put a standard switch. Could this be the problem

 

[DAKSY]

Looking at the area above the valve, there is a small rocker switch & a red igniter button. This is NOT a DSI model. Please post a pic of the pilot assembly.
Have you taken a reading on the thermopile output?

 

[49er]

just tried it, Nada.

I always find these valve markings a bit confusing so just to confirm. When you jumpered the terminals as DAKSY suggested, you were touching the top and bottom terminals and not to the center terminal?
Also, I believe that your loose black wire connects to the on/off switch.

 

[Beach Dougie]

49er. yes i touched the outside terminals not the center. I agree the lose blacxk wire connects to the on off swithch. but i can't trace where it does. any advice

 

[Beach Dougie]

 

[Beach Dougie]

picture of the pilot