How to investigate a faulty pilot light?
August 17, 2005 4:33 AM Subscribe
What might cause a hot water boiler's pilot light to repeatedly go out? We've replaced the thermocouple, inspected the pilot assembly, and had the boiler cleaned. Twice.
posted by zogbie to Home & Garden (6 answers total)
Over the course of the last winter, the pilot light for our radiator boiler kept going out. At first it would only go out when the weather would suddenly shift from cold to warm. This made us suspect air pressure or down drafts. By the time Easter rolled around though, it was going off closer to every two or three days.
We've had three different HVAC guys look at it. The first told us it was the thermocouple and replaced it. A week later when it went out again, a different technician from that company told us "someone used the wrong size thermocouple."
The other two companies both wanted to start with a standard cleaning of the burner cones, etc, despite my insistence (especially the 2nd time) that the problem was somewhere else.
I'm reluctant to call any of these companies back and continue paying to not solve the problem. Is there anything I can do to check my hypothesis about wind being to blame? Are there any other likely suspects?