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Ask The Trades › DIY Forum › Plumbing Questions › baxi 105E dhw problem

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baxi 105E dhw problem (Read 3039 times)

nelo36

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baxi 105E dhw problem
Nov 30^th, 2013, 1:27pm

hi there noob here i am having problems with my baxi 105E which main one is DHW runs cold when the CH is on i have had a new diverter valve fitted which works fine but didnt cure the prolem and i have changed the plate heat exchanger which didnt cure the problem i think its to do with heat expansion somewhere in the boiler as when the CH has been off fow 10 mins the DHW is fine
could any one advise what they think may be causing this
many thanks in advance
nelo36

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thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: baxi 105E dhw problem Reply #1 - Dec 2^nd, 2013, 2:35pm Hi, Th4e diverter should cut the heating off when you run hot water. Have you checked you're not getting a backflow though a shower or mixer tap
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nelo36 GDPR opt-out Total Thanks: 147 For This Post: 0	Re: baxi 105E dhw problem Reply #2 - Dec 17^th, 2013, 12:38pm Hi There i dont think im getting back flow i have changed the full diverter and Plate heat exchanger i have order a temp sensor for the DHW manifold which i will change in the next few days when i can persuade the missus to turn the heating off shouldnt be a problem with al the big coats she has Ha cheers nelo 36
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Lectrician Administrator Trade Member Author Offline Ask The Trades Posts: 8814 Total Thanks: 109 For This Post: 0 Braunton, North Devon United Kingdom Gender: Trade: Electrician	Re: baxi 105E dhw problem Reply #3 - Dec 17^th, 2013, 6:46pm Turn off the cold supply into the boiler. If your hot taps still flow a bit, you have some cold water back flowing from a mixer tap or shower mixer etc.
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nelo36 GDPR opt-out Total Thanks: 109 For This Post: 0	Re: baxi 105E dhw problem Reply #4 - Dec 30^th, 2013, 12:24pm hi there turned off cold water feed no flow at the taps also have changed the DHW sensor in the plate exchanger manifold no change but did notice the old sensor was corroded ad also the plug and one of the pins in the old sensor was missing has anyone got any more ideas ? many thanks nelo36
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