We've had a Santon Premier Plus 150 ltr unvented water heater installed. This is to run off the economy 7. After 2 months, we have had problems from the outset. No matter what setting, all we are getting is enough hot water for 2 morning showers!
Santon have been on-site and found no problems with their heater but provided new elements and thermostats. The original fitters have been round too many times to count and found no problems. EDF have checked the meters and found all settings correct. We have purchased and fitted a new Horstmann Economy 7 Quartz switch. After all this, the problem persists and no one has a solution for each believes his part of the system is 100%.
We are having to use the expensive boost switch to get any hot water during the day and early evening. Since we are pensioners, this is proving very costly and totally defeats the object of the system.
We are at a loss here, so would any expert having encountered a similar problem and found the reason to be totally unexpected or was something that was a big surprise, kindly let us know?