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Back to Gas Geyser Repair Gas Geyser Repair · Navsari

Geyser runs but no hot water

It runs but the water stays cold at the tap.

Why this happens

  • Very low gas pressure or a near-empty cylinder
  • The flame lights but goes out (thermocouple)
  • The water flow is too high, so it passes before heating
  • Very cold inlet water in peak winter

Safe checks you can try

  1. Check the cylinder gas and the regulator
  2. Reduce the tap flow a little so the water has time to heat
  3. See whether the flame stays lit while running
  4. If the flame dies, the thermocouple or valve needs a technician
In peak winter, reduce the flow for hotter water; the geyser heats slower with very cold input.