Problem with Worcester Combi boiler linked to Thermally heated tank

[Sandwedge]

There is a thermo-panel on the roof of my bungalow linked to a cylinder/tank which in turn feeds luke-warm water into the Worcester Combi presumably for economic purposes. I cant find a plumber who understands the system and at the moment the hot water pressure is very low and the shower goes cold within a minute. I think it may be due to silted valves but I do not understand the way it works. Would I be better off shutting down the Thermal system and have a cold main go straight to the Boiler? Hope you can help. Thanks.

 

[joni os]

Get your cylinder checked by a plumber qualified to work on unvented systems and check condition of DHW plate heat exchanger.

 

[Worcester]

The thermal preheat is quite a common installation, and simple to manage when you know what you are doing.

The problem could be in one of three areas, you'll need to find a specialist that actually understands what is going on. There should be details of the original solar thermal installer on the DHW cylinder or in the paperwork given to you when it was installed or when you purchased the property.