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Hi, I have a Vaillant ecoTEC boiler. Over the last couple of years, I've noticed that the difference in pressure between when the heating is off, and when it's on, had been slightly increasing but it was all within normal limits.
This month that difference has massively increased. Today it went from 0.7 to 2.6 (at which point I turned it off) in under 10 minutes.
Before I turned it on I had to add water to increase the pressure from 0.5.
Any ideas on what would cause this, and how to fix it, would be much appreciated?
Thanks in advance.
This month that difference has massively increased. Today it went from 0.7 to 2.6 (at which point I turned it off) in under 10 minutes.
Before I turned it on I had to add water to increase the pressure from 0.5.
Any ideas on what would cause this, and how to fix it, would be much appreciated?
Thanks in advance.