baxi 80e 105e hot water running hot and cold

4 Mar 2012
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Newcastle upon Tyne
United Kingdom
Hi, Can any one help. I have a baxi 80e - 105e combi boiler. when running hot water it isgoing from hot then cold, boiler pressure is ok, and no falt coming up on the lighting panel. also the hot water is not running as hot as it should.
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Plate heat exchanger scaled is the most likely reason
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As already said, most likely the plate hex, and it can be cleaned.
Removing it is a bit of a juggling act though, if you have never done one.
If you do plan to do it yourself, then watch the pcb, when you take out hex, plenty of towels /kitchen roll needed, as these pcbs only need to sense water around and they go kapput

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