Bionaire BCH9212 does not produce heat
These Bionaires (including your 9212 and its taller version, the 9224) have a small temperature safety relay mounted slightly above the ceramic heating elements. Its purpose it to shut off the elements if they overheat, which I would assume would happen if the fan stops working or possibly if the outlet to the front becomes blocked (and these ceramic elements, which are like a radiator core, do get a lot of dust accumulated on the inside which will block air flow). The sensor is a small unit with exposed contacts and if these contacts open (driven by the temperature sensor connected to them) or if these contacts do not have good contact (say by dirt or oxidation build up that makes them effectively fully or partially open) then the ceramic elements will not work. My best suggestion to explain your problem is that the contacts on that safety switch became dirty during storage. The only way to verify that (and possibly repair the unit) requires taking the outside shell off and cleaning the contacts of the safety switch with either a small, fine file (like the old ignition files) or maybe fine emery cloth.
Nov 30, 2011 |