I have the following storage heater which isn't working, the last time it was, was during the severe winter weather late 2010 and earlier this year.
Heatstore HSX724 (input rating 3.425 KW / 24 KWh)
The outlet for this particular heater is non-fused, however the others are actually fused. I have noticed a hairline crack running through it (rubbed dust into it to make more prominent in photo), obviously I will have to replace this but am not certain whether this should be a like-for-like replacement or fused as the other heaters are.
Initially I thought it might have been the internal overheat cutoff that may have been triggered, however this wasn't the case. I then checked the heating elements connections and noticed a build up of dust from the bricks which was actually inside the contacts. Believing this dust was insulating the contacts I cleaned these out, still nothing.
Using a non-contact Fluke voltage detector pen, I've been able to ascertain that there is infact no live feed on the load cable from the outlet. Based on this I can only guess there is either a continuity fault or with the actual MCB (although this hasn't actually tripped nor shows any signs of damage). Fortunately I have crawl space access and checked whether the cable run has been damaged, which it appears it hasn't.
MK Consumer Unit (split load)
Lower load which is Economy7 night rate is populated with;
1 x LN6420s 20A 4 Pole
1 x LN6220s 20A 2 Pole
5 x LN5916s 16A MCB (one for each storage heater and water immersion)
Before I consider calling in an electrician I have a couple of questions;
1) Should the outlet mentioned above be fused, as the other heaters are?
2) Is there any other test I can carry out myself to determine where the fault actually lies?