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Plumberpro
Plumberpro, Plumber
Category: Plumbing
Satisfied Customers: 634
Experience:  Heating and plumbing answers. 20 years experience
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We have a worcester cdi 40 combi boiler in our small business

Customer Question

we have a worcester cdi 40 combi boiler in our small business but 3 of the rads are not heating. We have bled them and the valves are working. Where else could the fault be
Submitted: 1 year ago.
Category: Plumbing
Expert:  Plumberpro replied 1 year ago.
Hi , do they have thermostatic radiator valves on one side?
Customer: replied 1 year ago.
Yes but these have been removed to check if the pin will move up and down and they seem ok
Expert:  Plumberpro replied 1 year ago.
Hi , it could be that the washer inside has stuck down onto the valve seating. I usually tap the valves gently with a hammer which manges to dislodge them from within the valve. If this doesn't work then the valves would need replacing. I don't think it is likely to be anything else

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