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Same crummy old combi. This time the rads are getting warm when the DHW is run - is the DV sticking again?? Ideas, please. Mike MOD dont hijack old posts please

All fixed. Replcd diaphragm. Also had to service lower valve as this had deposits on the valve seats. Thanks PS complete service kit cost £21 from R F Symons at Ruislip

Thanks ChrisR. Chkd today and discovered small hole in tube from aps to flue. Ariston said that it should have a small brass fitting to let out any condensation! Removed piece of tube with hole - all now fires up okay. Comments!! Took DV to pieces and discover badly damaged diaphragm...

Same old Ariston Eurocombi 24SX i'm afraid. DV getting stuck again with DHW getting cooler. Will clean out and recommend replacement. However, strange prob with air pressure switch. Boiler currently NOT firing up until I short out the Common and NC (or C + NO) on pressure switch. Then...

Fault fixed. DV valve was heavily limescaled up and very sluggish in movement. Also, when I stripped down the DV I found 4-5 smallish pebbles in the valve. Gave a good cleaning out. All now works well. Client said that the DHW had never been so good. Thanks to ChrisR &...

1. C/H only comes on when DHW is drawn 3. a comment from another colleague Hoping to get in and have a look in next day or so - will update you on result. Thanks.

1. Weargas - C/H comes on when ever the DHW is run, hence explaining the lack of heat in the DHW. 2. ChrisR - Appreciate the point about the DV pin - I will look and check. 3. Could another possibility be that the heat exchanger is full of debris..?? could this have this effect..?

Ariston Eurocombi SX20 MFFICE (6 yrs old) Problem: DHW is not running very warm (been like this for a week) However, the C/H (although no demand) is ON. Possible cause: faulty divertor valve - sticking open on both DHW & C/H Would appreciate someone with greater experience adding...

Old 105 (pre- 1984) heating large London offices. Front panel removed - water visibly dripping onto burners. Any ideas about the cause?? and solution?? Also, anyone know of any source of spares for this aged beast?? Thanks :(

I'm not sure if this is of any value but it fixed my problem.. DHW worked fine, however, CH fired up for 10 sec until upto temp then turned off. Pump ok. However diverter valve hot but no h/w going into the CH cct. Problem turned out to be 2 dripping taps. Enough water at the top of the...