Baxi eco80 no hot water

[andyRN]

CH operates properly, when DHW selected it runs cold, diverter valve pin is in upright position when CH is on, DHW cold, when CH off pin is lowered, water is still cold and boiler will not fire, any ideas?

 

[TipTop]

Got enough water pressure in system? 1.5bar-does dhw pin make microswitch? should be one facing you on left as you look at blr. if not needs dhw diaphragm

 

[andyRN]

Thanks for the reply pal, yeah it makes the switch and the pressure is ok, I took the diaphragm out and had a look, was maybe a bit stretched bit looked ok?!, how does that Vv actually operate?

 

[andyRN]

Had another look at the diverter Vv the hot water end, that faces you with the six screws, took off the cover and the diaphragm behind the plastic disc that operates the pin was knackered, changed it and normal service resumed!

 

[andyRN]

Wee query further to the last post, is there a way to increase water pressure and temperature on these boilers?

 

[TipTop]

is hot water temp poor then?

 

[andyRN]

Yeah it's operating correctly now as far as o can see and from following the manual, though the water is not that warm and the pressure isn't as good as it was????!

 

[shaky]

May be a bit scaled up in the plate hx

 

[andyRN]

I've had thE plate HX out and descaled, made no difference, guess it's just the time of year and the colder water?, any ideas on pressure? Ta fir the input guys!!

 

[baxi-moldova]

How about cold water preasure? Is it higher then dhw or the same?

 

[andyRN]

The temp is ok now that I cleaned out the plate HX but the water pressure on the DHW is not as high as the cold!