dhw

I have an Ideal iStor HE260 and have just purchased a 3rd gen Nest Thermostat. However, I'm a little confused as to whether the nest can control my boiler's hot water. The Nest documentation (and customer services) state that the Nest cannot control DHW on combi boilers. However, my...

Hi, I have a fault on my boiler which is causing the Divert valve to continuously motor open/close with consequential impact on the CH and cycling hot/cold water when DHW demanded. I have found 240v is permanently on the CLOSE terminal on the divert valve, when CH is demanded 240v is applied...

We have an unvented Vaillant ecotec 630 system boiler with a Gledhill 200 litre slim tank on the first floor and the boiler in the utility room on ground floor. Can anyone advise why pump speed (d.019) 2 would be used over speed 1 & what setting would be best for minimum gas usage? Thanks

Hi folks. Due to external rust in the radiator units (and putting in a log fire), I no longer need the central heating part of my system, and have proceeded to remove some of the radiators around the house. For some reason now, the hot water won't work (worked fine when the heating was...

Having some issues with hot water in our flat and hoping that people might be able to help us isolate what and where the problem is. We have a Worcester Greenstar combi boiler - either the 24i junior or the 28i (I should know which but there is nothing anywhere on the casing to indicate.) About...

The 250ltr cylinder I have isn't supplying hot water. It's supplies luke warm water or intermittent hottish water. It has been drained down and recharged. Plenty of hot feed from the boiler primaries. There is red hot water from thermo pressure release valve near the top of the tank but...