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- 5 Nov 2017
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Hi,
We have an intermittent but common fault on our 7 year old ecoTEC838 Vaillant boiler.
When running hot water, the water temperature will suddenly spike to an auto-safety shutoff point (over 80 degrees). We get "overrun" errors "water Deficiency" errors. (Specific errors: F20 "Temp Limiter", F24 "Temp rises too quickly").
Sometimes when the heater shuts down, there is a large thud. There is also sometime light metallic tinkling sounds as the water runs through the system.
We were advised this was because we're missing a magnetic filter and that rust is blocking the boiler.
I believe this but We're being quoted £900 to powerflush the system and add a filter.
Is this reasonable? Is there a simpler (cheaper) explanation/fix?
Thanks in advance!
We have an intermittent but common fault on our 7 year old ecoTEC838 Vaillant boiler.
When running hot water, the water temperature will suddenly spike to an auto-safety shutoff point (over 80 degrees). We get "overrun" errors "water Deficiency" errors. (Specific errors: F20 "Temp Limiter", F24 "Temp rises too quickly").
Sometimes when the heater shuts down, there is a large thud. There is also sometime light metallic tinkling sounds as the water runs through the system.
We were advised this was because we're missing a magnetic filter and that rust is blocking the boiler.
I believe this but We're being quoted £900 to powerflush the system and add a filter.
Is this reasonable? Is there a simpler (cheaper) explanation/fix?
Thanks in advance!