We have a 35 CDi combi installed about 3 years ago. We also had the water mains supply replaced - new blue polypipe - and flow is great.
Recently, when running the hot water tap, I've noticed that the boiler cuts out after a short while. When the hot tap is running much cooler water (cold!), the boiler kicks in again. (The central heating is OFF.)
A 5 minute shower is interrupted 4/5 time by these cooler water spells.
The boiler has had a service does annually, costing sme £150. I would prefer not to fork out more if there is a simple DIY fix for this.
Any suggestions...
Recently, when running the hot water tap, I've noticed that the boiler cuts out after a short while. When the hot tap is running much cooler water (cold!), the boiler kicks in again. (The central heating is OFF.)
A 5 minute shower is interrupted 4/5 time by these cooler water spells.
The boiler has had a service does annually, costing sme £150. I would prefer not to fork out more if there is a simple DIY fix for this.
Any suggestions...