Safety first, every time
Peoples Gas, which supplies natural gas in Manatee County, puts it in five words: smell natural gas, get away. If you smell gas at the heater or anywhere in the house, do not relight the pilot, do not operate switches, leave the building, and call 911 and then Peoples Gas at 877-832-6747. Nothing in this guide applies until that is ruled out.
Propane heaters follow the same rule; the number is your propane supplier's.
Lights, then goes out when you let go: thermocouple
The thermocouple is a small probe that sits in the pilot flame and generates a tiny voltage to hold the gas valve open. When it fails, or is coated in soot, or has shifted out of the flame, the valve closes the moment you release the knob. Two things a homeowner can try: hold the knob down for a full 60–90 seconds before releasing (a cold thermocouple needs time), and check that the pilot flame is blue and wraps the tip of the probe rather than flickering beside it.
If it still drops out, the thermocouple is replaced. On heaters from the last fifteen years or so it is part of a sealed pilot assembly and the manufacturer's part is the right one; on older units it is a universal part. Either way it is a short visit.
Stays lit for a while, then goes out: draft, dirt or the valve
A pilot that runs for minutes or hours and then dies is a different fault. A draft across the burner compartment — a garage door left open, a bathroom fan pulling air through the house — can blow it out; so can a dirty pilot orifice that lets the flame shrink until the thermocouple cools. A gas control valve that is failing does the same thing intermittently and, on newer heaters, may show a blinking status light with a code on the label.
Check the vent as well: a heater whose flue is blocked or disconnected can shut its own pilot down as a safety response. That is also a carbon-monoxide risk, which is why a plumber checks draft before relighting.
A gas valve replacement is the point at which a heater over ten years old is usually replaced instead; Rosco Plumbing will put the part against the $900–$1,500 replacement range at the same visit.
When to stop and call a licensed plumber
- You smell gas: leave, call 911, then the gas utility — before calling a plumber.
- The pilot will not light at all after following the label's sequence twice.
- The pilot lights and holds, but the burner never fires — that is the control valve or thermostat, not the pilot.
- The pilot keeps dropping out after a new thermocouple, or the status light on the gas control is flashing a code.
- There is soot on the tank, the vent hood is loose or rusted, or anyone in the house has unexplained headaches — do not relight; the flue needs inspection.
Rosco Plumbing's service call for a gas water heater diagnosis in Manatee County is $75–$150, applied toward the repair.
Call (941) 345-2464 or request a free estimate. Residential service in Manatee County; ranges are planning figures, not quotes.
Have Rosco Plumbing contact you about this
Describe what you are seeing and Ross will call or text back with what it sounds like and what the visit costs — no obligation.
What changes in Manatee County
Gas water heaters are a minority in Manatee County — most of the 2000s-and-newer subdivisions are all-electric — so the pilot problem clusters in older Bradenton, Palmetto and Ellenton homes, and in the newer communities that ran gas for the kitchen and the heater. In garage installations a pilot blown out by a summer thunderstorm gust through an open door is common enough that it is worth checking the weather before assuming a part has failed.