I have several portable electric heater fans. I only use them very rarely.
The fans on the heaters always start up very slowly when they are first
turned on. Probably because they are old....
After a few minutes of operation they seem to get up to operational speed
and the heat sensor stops tripping.
I guess that the fan bearings need some form of lubrication. But what should
A new portable electric heater in my opinion. These aren't terribly
expensive (usually). And if the motor is gumming up there's not really
much you can do about it.
Oiling one of these isn't an option. You may increase the fire risk by
putting burnable material (oil) in close proximity to a heater
I have regularly lubed old fan heaters for many years of additional use,
none have caught fire, some have given out a quick puff of smoke, as I spray
them while they run. so I suppose there is a small risk of fire. I have
used all sorts of different spray lube with a tube. Duck oil works well.
HI-Tef is best , but I have run out.
I really would not recommend any form of PTFE/Teflon based spray. When burned
this forms a poisonous gas (phosgene I think).
Ordinary oil applied to the motor which usually has oilite sintered bearings in
If it takes that long its more likely to be muck in the bearings. A
solvent in there should improve things, let it all dry of then lube it
again with oil or grease, whichever was used initially.
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