The fan motor woun't come on but the ceramic plates still heat. The fan motor is function when indipendently hooked to a power source. There is a set of contacts just above the ceramic plates. When they are manually pushed togeter the unit operates fine. Is it safe to hard wire across the contacts and/or what is prohibiting them from automatically connecting?
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Re: LASKO model 5400 ceramic heater
The contact are just a set of points. If you can remove them, file or sand, or whatever will do the job, a little on the place where the contacts touch. Usually that's all it takes. Make sure when the switch is turned on the lever/spring assembly moves and at least tries to make them touch. I don't really see a problem with directly wiring the fan. The only drawback is there is no real control except pulling the plug.
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My experience with Lasko heaters is with the small portable ceramic types. On mine there are two knobs. One is the "Power"; the fan symbol is for fan only, then (I) Low Power and (II) High Power 1500 watts. The other know is the thermostat from (-) to (+). Set the thermostat towards (+) until the temp in the room is the way you want it. Then turn the thermostat know towards (-) until the unit shuts off. This is now the temperature setting and the heater will cycle on and off to this setting. Hope this helps.
I do not know how to solve this problem but i will add my own solution. Like you said, you will have to wait for it to begin functioning again after you plug it back up.while its unplugged, you have to wait a moment until a small click it made.
sounds to me like you have a fan blade hitting something inside the unit, or the motor is going bad, thats the only moving parts to the unit unless it has a sweeping mode, moves from side to side, if it doesnt have that, then its your fan motor or blade, you probably need to replace the motor or the whole unit, as they are fairly inexspecive, but its your call, look inside the unit to see if anything is in there that might be making the noise as well, best of luck, hope that helped