S1 2.8 getting through purple relays.
Discussion
Can you break open the relays melted casing ?
If so, this is to identify what is overheating.
It can only be the coil or the contacts.
If its the coil that's burnt, it could be a bad pin connection, although that has a low current draw, so less likely than below..
If its the contacts, it could be the same, or that the pump is drawing too much current. IE. A faulty pump, hence why its a repeat event.
Some meter based testing may be required to prove.
T.
If so, this is to identify what is overheating.
It can only be the coil or the contacts.
If its the coil that's burnt, it could be a bad pin connection, although that has a low current draw, so less likely than below..
If its the contacts, it could be the same, or that the pump is drawing too much current. IE. A faulty pump, hence why its a repeat event.
Some meter based testing may be required to prove.
T.
Edited by Blue 30 on Tuesday 27th August 22:31
The relay would normally be cooled through the terminals, but if the terminals have been heat damaged and/or corroded they may not be making a good mechanical connection (so less cooling) and may produce resistive heating. Check that all the terminals in the mounting socket are clean and tight on the relay terminals. It isn't easy to do that with the relay itself but is easy to judge by putting an ordinary male spade connector into the socket.
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