The situation
Illustrative example. Not a real job or customer.
A homeowner wakes to cold showers two or three mornings a week. Each time, the pilot on the standing-pilot gas tank in the garage is out. It relights by following the label, then runs fine for a few days.
- They confirm there is no gas smell before each relight
- They start a symptom log with the date, time and weather
- They notice outages follow windy nights
- They stop relighting and call a licensed plumber after the third outage
The log pointed the plumber toward a draft at the burner opening plus a worn sensor that let a weakened flame drop out.
Excerpt from the homeowner's log
| Morning | Pilot | Night before | Notes |
|---|---|---|---|
| Day 1 | Out | Windy | Garage side door left open |
| Day 3 | Lit | Calm | Normal hot water |
| Day 4 | Out | Windy | Door closed, still out |
| Day 6 | Out | Windy | Stopped relighting, called plumber |
What the plumber checked, in this example
- Gas and venting.Confirmed no leak and that the vent was drafting properly.
- Pilot flame.Found a smaller, unsteady flame.
- Sensor.Tested the thermocouple and found it marginal.
- Combustion air and drafts.Pointed out a gap near the garage wall that sent gusts toward the burner opening.
Why the log mattered
On the day of the visit the pilot was lit and the heater worked. Without the log, the visit could have ended with 'cannot reproduce'. The pattern of windy nights gave a reason to look at drafts as well as parts.
Replacing the worn part fixed the immediate problem, and addressing the draft reduced the chance of it coming back.
Common questions
- Is this a real case?
- No. It is an invented example to illustrate diagnosing an intermittent pilot problem.
- Can wind really blow out a pilot?
- Strong drafts near the burner opening can disturb a weak pilot flame. That is worth mentioning to a plumber.
- Should I keep relighting a pilot that goes out often?
- No. Repeated outages mean something needs attention. Call a licensed plumber.
General information for Fullerton, not a quote or professional advice. In an emergency, call 911.