If i switch my high switch to low it does not switch stays in high?

Answer:
switch is faulty

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
First answer by RBGrant. Last edit by RBGrant. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 1 [recommend question].