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Hi there,
I have a Vokera Compact 28 combi boiler.
It's been playing up a bit recently, the hot water is cycling between hot & cold, and the boiler also goes off an on which matches the hot and cold water cycling. The water doesnt go completely cold, but goes from luke warm to very hot. I believe, that when it reaches very hot, the boiler switches itself off.
Its around 9 years old now and has by and large performed without fault up till now. Reading up a little, I think the issue is possibly with the Thermistors, primary or secondary. The Heat exchanger being clogged with accumulated debris over the years, or something to do with the gas feeding the flames not being regulated correctly - gas pressures?
The only thing I could attempt to fix myself here are changing the thermistors. This will be the cheapest and easiest thing to change to try and fix or rule out that as the issue.
I'm not sure I would want to attempt to descale the heat exchanger, and obviously wont be touching anything gas related.
So the question I have is, does this sound like I'm on the right lines? And if so, how does one go about draining the boiler of water before removing and replacing the thermistors. They seem easy enough to get access to, but I think if i remove them, water will jet out of the hole?
Thanks for any tips, or recommendations..
David
I have a Vokera Compact 28 combi boiler.
It's been playing up a bit recently, the hot water is cycling between hot & cold, and the boiler also goes off an on which matches the hot and cold water cycling. The water doesnt go completely cold, but goes from luke warm to very hot. I believe, that when it reaches very hot, the boiler switches itself off.
Its around 9 years old now and has by and large performed without fault up till now. Reading up a little, I think the issue is possibly with the Thermistors, primary or secondary. The Heat exchanger being clogged with accumulated debris over the years, or something to do with the gas feeding the flames not being regulated correctly - gas pressures?
The only thing I could attempt to fix myself here are changing the thermistors. This will be the cheapest and easiest thing to change to try and fix or rule out that as the issue.
I'm not sure I would want to attempt to descale the heat exchanger, and obviously wont be touching anything gas related.
So the question I have is, does this sound like I'm on the right lines? And if so, how does one go about draining the boiler of water before removing and replacing the thermistors. They seem easy enough to get access to, but I think if i remove them, water will jet out of the hole?
Thanks for any tips, or recommendations..
David