water heater issue??

[jarin12ga]

I replaced my vertical sun dance spas hot water heater. I think it's called the Montenegro tub?? Amway's on one of wires,it has a round plug/cylinder shape that plugs into the heater. But the hole is a little bigger on the new aftermarket  unit?? Do I need a different wire or is it the wrong heater all together??It looks actually the same besides that hole for the wire!!

[Kev B]

 It would be best to post a picture of it, I am not totally sure of what your talking about and wouldn't want to steer you in the wrong direction.

[SerjicalStrike]

I'm assuming you mean the hi-limit probe. You may need to put a dab of clear silicone over the hole after you put the hi limit back in.