The pressure switch contacts seem welded together, inspect and verify. Replace the switch as necessary. How? Get a compatible replacement, disconnect it electrical and plumbing, remove and replace accordingly, use thread sealer.
What? If it won't shut off when it trips the limit valve. You need to replace the pressure switch.
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The pressure switch contacts seem welded together, inspect and verify. Replace the switch as necessary. How? Get a compatible replacement, disconnect it electrical and plumbing, remove and replace accordingly, use thread sealer.
What? If it won't shut off when it trips the limit valve. You need to replace the pressure switch.