Recent content by Steve Hall

You've got me thinking. The pcb issue could still be the problem. What are the odds that two new pcbs, both Siemens and manufacturers parts, are both faulty? The money (£100ish) has been spent but if they are both faulty and I get Potterton to come and fix it and it is the pcb, I've got a...

Just re-read your post. I think that you are questioning the possibility of cross contamination between hot and cold. No, that isn't happening. We test the hot water in a sink which has a hot tap, not a mixer and is within two feet of the boiler.

Thanks for the reply. The plate heat exchanger was not scaled (we have incredibly soft water) and debris was minimal. We'll have a look at the other suggestions. The hot water never gets really hot. Even if the boiler says 60 it is around 45 degrees. On CH it does get much hotter and I...

I'm not a Gas Safe engineer but all the work I'm about to describe has been carried out by one so don't jump down my throat!! Potterton Promax Combi 24HE Plus LPG boiler. DHW has been getting gradually cooler, CH working fine. Got an overheat (E130) error on HW. Changed the overheat sensor...

Getting an E130/131 fault code. The flue thermistor has been changed with no difference. The odd thing is that when hot water is demanded, it heats to 60 degrees and then the E130 happens. When CH is demanded it heats to 80 degrees and is OK with no fault. If I demand HW with CH on, the...