Question about Heating & Cooling
F20 is a flow sensor error. Can be due to a defective sensor/ not correctly fitted, or you may have poor circulation, a big difference in flow and return temperatures, can sometimes make the boiler think it has a defective sensor, check good circulation through system, or if you have thermostatic radaiators valves on every single radiator, take 1 head off, as if you dont have a bypass fitted, it needs a radiator as a bypass circuit
Posted on Mar 03, 2009
Checkout the co. website.!
Posted on Aug 30, 2008
Check the internal rubber connection hoses on the flow and return, if they feel crunchy, that's probably your problem.
Posted on Sep 22, 2015
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Posted on Jan 02, 2017
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