When the immersion heater in your hot water cylinder fails, you lose hot water but not heating. We diagnose, replace and re-commission the element same-day on most call-outs.
What we do for immersion heaters
Both vented and unvented cylinder immersion elements: failed thermostat, blown element, scaled-up heating coil, tripped overheat cut-out. Like-for-like swap with a Megaflo, Heatrae Sadia, or generic 11" or 14" Incoloy element depending on cylinder type. Power-isolated test before leaving site.
Common immersion faults
No hot water from the immersion only
Element failed open-circuit. Multimeter test confirms in minutes.
Trips the consumer unit immediately
Element has gone to earth. Replace the element; the RCD has done its job.
Hot water lukewarm only
Thermostat is set low or has failed. Often a five-minute fix.
Cylinder gurgling or banging
Heavy scale on the element. Replacement element plus descaling tablets in the cylinder.
What it costs (indicative)
Most immersion swaps complete inside the one-hour minimum labour charge plus the element at trade cost + 30%, itemised. Labour runs from £90 / 30 min (daytime) up to £180 / 30 min (nighttime) (see /pricing). Full pricing.
When to call us
- ✔ No hot water but the central heating is working fine.
- ✔ The immersion trips the consumer unit when you turn it on.
- ✔ You can hear the cylinder kettling or knocking when the immersion is on.
- ✔ You're a landlord and a tenant has reported no hot water from the immersion.