Water heater on but the water’s cold? Sometimes it’s a small valve, not the heater
If the heater is on and the water comes out cold or lukewarm, or hot water comes out of the cold tap, the heater may be fine: a worn mixer or a check valve that won’t close can let hot and cold water cross between the lines.
- Symptom
- Heater on but the water is cold or lukewarm, or hot water comes out of the cold tap
- Likely cause
- A worn mixer or a check valve that won’t close, letting hot and cold cross, or the element, thermostat or safety cut-out
- Who fixes it?
- You first, then a technician