Question about Comfort-Aire RAD-243 Air Conditioner
D2 is not a fault what that means is delay and 2 refers to CH which means the boiler has gone into standby mode. you need to check that your CH circut is open, there is a filter on the return valve into boiler make sure this is not blocked. If this is blocked the water is just going though the boiler by-pass so then the boiler thinks its up to temp. hope this helps
Posted on May 04, 2010
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Posted on Jan 02, 2017
SOURCE: ferroli optimax 31c
Here is a link to the manual.It shows fault codes.
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Posted on Jan 17, 2009
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