Hello all,
I have a 15 month old Vaillant Ecotec Plus, installed by a trusted plumber, who has done a star job for us for 15 years. When installed, he flushed the CH system (which was spotless anyway, we have fairly soft water) and installed a quality filter. It's been serviced regularly and fine until about 6 months ago.
At that point, it started making a sort of machine-gun type rattle when the CH pump was running, and the DHW Temp wouldn't get above 57C, despite the stat being set to 65C. Plumber said call Vaillant, Vaillant engineer attended, and changed the main gas valve and flow meter due to sulphate contamination (excuse the terminology, I'm non-industry) and it was fine until now.
On Friday night, we had the mother in-law round to babysit, so ran the CH hard for the first time in a while (she's 85 so likes it warm). I noticed the machine-gun noise again at that point, although it had continued after the engineer visit when ever the CH got hot. CH loop pressure is normal, even when hot.
Today, the DHW Temp dropped off again - refused to go above 57C, and the bath filler was lukewarm. It's about 16C outside here just now (roasting for Edinburgh) and back in March I was blaming the low temp of the incoming main supply.
I turned the boiler electric supply off at the mains then back on 10 min later, and the DHW Temp was back to normal.
'Live Monitor' shows nothing unusual.
Any ideas? I can get Vaillant back out on warranty, but I'd like some choice questions to ask this time.
Thanks in advance.
Niall
I have a 15 month old Vaillant Ecotec Plus, installed by a trusted plumber, who has done a star job for us for 15 years. When installed, he flushed the CH system (which was spotless anyway, we have fairly soft water) and installed a quality filter. It's been serviced regularly and fine until about 6 months ago.
At that point, it started making a sort of machine-gun type rattle when the CH pump was running, and the DHW Temp wouldn't get above 57C, despite the stat being set to 65C. Plumber said call Vaillant, Vaillant engineer attended, and changed the main gas valve and flow meter due to sulphate contamination (excuse the terminology, I'm non-industry) and it was fine until now.
On Friday night, we had the mother in-law round to babysit, so ran the CH hard for the first time in a while (she's 85 so likes it warm). I noticed the machine-gun noise again at that point, although it had continued after the engineer visit when ever the CH got hot. CH loop pressure is normal, even when hot.
Today, the DHW Temp dropped off again - refused to go above 57C, and the bath filler was lukewarm. It's about 16C outside here just now (roasting for Edinburgh) and back in March I was blaming the low temp of the incoming main supply.
I turned the boiler electric supply off at the mains then back on 10 min later, and the DHW Temp was back to normal.
'Live Monitor' shows nothing unusual.
Any ideas? I can get Vaillant back out on warranty, but I'd like some choice questions to ask this time.
Thanks in advance.
Niall
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