Water Heater Pilot Light Keeps Going Out: 5 Real Causes

Thermocouple, draft, gas pressure — the fixes that actually solve a repeat pilot-out problem.

If you searched "water heater pilot light out", you probably need a real answer in the next few minutes. Here it is — written by licensed plumbers who handle this every week in Riverside.

The short version. Most "water heater pilot light out" situations come down to one of three causes: a fixture-level problem you can confirm at home, a supply-side issue that needs a pressure test, or a downstream blockage that requires a camera. Knowing which bucket you're in saves time and money on the call.

What we'd check first. Start at the closest fixture and work outward. If the issue is isolated to one location, the fix is usually local — a worn cartridge, a clogged aerator, a failed shutoff valve. If multiple fixtures share the problem, the cause is upstream and needs a pro.

Why this matters in Riverside. Local water quality (hard, ~270 ppm in most of SoCal), older galvanized service lines, and clay sewer laterals mean a small symptom often points to a bigger underlying issue. We've seen this exact problem hundreds of times in Riverside homes.

When to call us. If you can't isolate it, if water is actively moving where it shouldn't, or if multiple fixtures are involved, stop and call. Call (951) 582-2433 for Water Heater Repair & Installation in Riverside, 24/7.

Go deeper. This is part of our pillar guide Water Heater Installation in Corona: Complete 2026 Guide. The pillar covers every related question in one place.

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