Skip to content
All articles

Pilot Light Water Heater: 5 Simple Fixes

Pilot Light Water Heater: 5 Simple Fixes

When Your Pilot Light Water Heater Stops Working

A pilot light water heater uses a small, constant flame to ignite the main burner. If you have a gas water heater and suddenly have no hot water, the pilot light has likely gone out. This small blue flame is the heart of older gas water heaters, and when it's out, your hot water supply stops.

Quick Troubleshooting Guide:

  • No hot water: Pilot light is likely out.
  • Blue flame: Working properly.
  • Yellow/flickering flame: Dangerous; call a professional immediately.
  • No visible flame: Needs to be relit.
  • Pilot won't stay lit: Usually a faulty thermocouple.

While many newer water heaters use electronic ignition, millions of homes still rely on pilot lights. The good news is that most pilot light issues are fixable with basic DIY skills. However, safety is critical when working with gas appliances. If you smell gas, leave your home immediately and call a professional. A gas smell could indicate a dangerous leak.

This guide will walk you through diagnosing and fixing pilot light problems, from relighting the flame to knowing when to call for expert help.

Infographic showing pilot light water heater troubleshooting steps: 1) Check for hot water, 2) Look for blue pilot flame through access panel, 3) If no flame visible, follow relighting steps, 4) If flame is yellow or flickering, call professional immediately, 5) If pilot won't stay lit after multiple attempts, likely thermocouple issue requiring professional repair - pilot light water heater infographic

Have an HVAC or plumbing question?

Our Torrance comfort experts are here to help — no pressure, just honest answers.

Ask an Expert