View Single Post
  #33   Report Post  
Posted to uk.d-i-y
Chris Bartram[_2_] Chris Bartram[_2_] is offline
external usenet poster
 
Posts: 748
Default WB 28i Junior questions (was Best combi for small 3bdrhouse?)

On 26/04/2019 23:22, wrote:

Water going hot/cold: one cause of this with combis is demand falling below minimum boiler output. Increasing water flow resolves.


NT


Our old combi showed that symptom when the flow switch started to fail,
but of course if you suspect the pump anyway it could be intermittent
flow in the heat exchanger.