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Heater blower stopped working on setting 3???

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As on title been dickie for a couple of weeks but have nothing on setting 3 but still works fine on 1 and 2. Please advise???????
It's all shits and giggles until someone giggles and shits 

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Anyone have any ideas, could it just be the switch??
It's all shits and giggles until someone giggles and shits 

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I had this problem and it was the switch 👍

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Agree pull switch off and replace....if that fails then the motor/blower to change. Switches are avaiable...as are new blowers.
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to test get a thick bit of wire and poke it into the red/black on the back of the switch. tough the other end to each of the wires and it should come on all the various speeds. if it wont come on fast, change the switch.

note the switches just love to explode if you try pulling the plug off the back, so dont bother unplugging it just poke the wire in the back of the plug.

when it comes to replacing it use a screwdriver in the gap to lever it off
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New switch on and working fine. Very cheap fix!!!!!
It's all shits and giggles until someone giggles and shits 
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