Repairing an air fryer

A

amateur_24

Member
Hi
I am trying to fix an air fryer that doesn't turn on.
I have discovered there isn't any ac power coming into the main board but there is ac power on the mains flex connection.

I traced backwards from where the ac is connected to the board. I found the board to be wired in series with a device shown in the picture. There are two one in series

What is this device called and how do I test it?
I suspect it's failed because that the only point of failure I can find.
 

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Tony Stewart said:
I think he said it was a 3.15A thermal fuse but you are correct it is rated by xxx 'C to prevent a fire which can happen when the popcorn blocks the exit , it can overheat. and trip the fuse.
Click to expand...

What has pop corn got to do with it?.

The 3.15A fuse is entirely separate, and is a solder=in type on the PCB feeding the electronics.
 
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Hi there is something strange going on with the fan motor. After I soldered in the thermal fuses, I switched it on. But the fan wasn't spinning and I could hear humming. I tried to turn the rotor by hand with the power turned off. I noticed it was difficult to turn.

I was turning the rotor by hand then all of a sudden the rotor loosen up. It's now spinning freely.
I am very sure the fan was working before i took it apart to solder the thermal fuses in.

Does this mean the motor is bad? The motor is welded shut so I don't think you can repair it.
 
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It sounds like it was seized up, if there any way to lubricate the bearings and see if that helps?.

It explains perfectly why the heat fuses blew.
 
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Often those small fans have sintered bronze bearings that 'gum' up or otherwise get sticky, it can pay to get some lubricant in them, better still, if the fan comes apart is to do this, and clean them.
Use very light oil.
 
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amateur_24 said:
Thanks. I located the problem. The fan was rubbing against the cables leading to the thermal fuse oops.

Moral of the story don't rush. Keep your cables clipped in.
Click to expand...
Oops indeed - so unless those cables were previously loose, then it probably wasn't the cause of the over heating?.
 
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