Arrived onsite to diagnose a no-heat issue on a propane boiler. We had performed an annual tune-up on Friday, 12/6/25, during which we provided an estimate to replace a worn thermocouple that the customer declined. They replaced the thermocouple themselves and experienced intermittent issues until the system eventually stopped producing heat. They also reported a gas odor when they contacted me on Sunday, 12/7/25, and I advised them to shut off the gas immediately. Upon arrival, I bubble-tested the pilot line and confirmed it was leaking. I advised the customer that all gas-related work should be performed by a qualified gas professional due to the associated safety risks. I replaced the pilot line and found that the thermocouple holder was melted, causing the thermocouple to be stuck in place. After reassembly, the pilot would not remain lit. Due to the damaged thermocouple holder, I recommend replacing the entire pilot assembly and thermocouple. Additionally, the expansion tank is
