I removed the wires from the thermostat and touched them together and nothing happened.
Pretty sure it does not have a transformer. I've looked at the manual and no mention of a transformer. There's a thermopile. Is that like a generator? I've noticed the heater is quite dirty inside. The manual says spiders can cause problems and I do have spiders in my house.
What should I use to clean the thermopile? A sovent? Or something else?
Thanks Tim. I'll try that.