After one year the heater stopped working, the fan motor still works, there is/was no dust build up at all, except the coil is pretty crusty in spots. Is it the coil? The thermostat? or the thermostat switch?
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Re: No heat but fan works L5600
If you can see any sign of a crack in the coil (Hot Surface Ignitor/HSI) it is probably bad.
If the inducer fan starts (the small fan) and you don't see the ignitor glow, it is almost definitely the ignitor.
Hope this helps
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If defrost heaters in freezer stop operating during defrost cycle, ice builds up around coils and blocks cool air from being blown to refrigerator side. If ice you need to defrost with heat and replace heaters. Remove rear freezer wall and look for solid ice covering coils. Also push freezer door switch closed while keeping door open and determine if fan is working.
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.
First think I think when I hear of a burning smell is have you cleaned out the motor housing real well lately. Lots of fuzz, dust, etc can build up in there and make that motor really work hard and start to make it want to overheat or over heat. Unplug the fan and take a tooth pic and get in the motor assembly and pull the lint etc out of there with it. Some canned air may help a bit to once things are loosened up.
As for lubricating the fan you won't oil it. The motor spins the fan so there is nothing to lubricate. When the motor goes the the fan stops so the best thing you can do is strip that fan the best you can and wash and dry the parts real good and clean the motor housing out real well to let that motor breath as much as possible.
When a fan motor gets old and is worked real hard it can get hot by default and things will smell hot. If the fan has already been cleaned real well the best thing you can do is give it a break more frequently or look into a replacement motor.
your car is older and inside your fan blower motor there is little magnetic brushes that are slowly being worn away everytime you turn on your a/c heat and this causes dust to build up between the magnetic connections try and locate your blower motor and bang on it a couple of times while its running alot of the time its right under the glove box above your feet. maybe that will loosen up some of the dust build up and give you a better connection. If not then just get a new blower motor
A big problem with these heaters ans well as others is the motor driving the fan. The bearings get stiff from dirt and do not spin fast enough activating the over temp device of the heating element. Check the motor out by placing the unit in fan mode them pull the plug or turn off looking at the fan to see how many revolutions is makes with no power applied. It should rotate like five times or more indicating freeness. If it hals to a stop immediately after power is removed the motor bearings are tight.
If your handy you take apart and oil the shafts using 3inone motor lube. Clean the motor of dust and dirt drop a few drops on the shafts near the bearings then work it in by hand rotating the blades. Do this a few times reassemble then lerripp!!!
its a heater cycle problem..the defroster is not working properly. its building up ice in the evaporator that touches the evaporator fan that makes that loud noise but stops when you open a door. it could be either a bad heater, a bad thermo disc or a bad timer.hope i was able to help
You can reach the fan wheel by using a can of compressed air normally used to clean your compute keyboard. Make sure you hold a vacuum wand close to the heater when doing this to collect the debris. Using a small coffee stir straw, lubricate the end of the fan motor shaft with light motor oil. This will keep the motor alive for a bit longer.