A water pump contractor came and suspect old fuses and relays (in the control panel) is causing the pumps not working. Can I buy the fuses and relays separately and ask any electrician to replace them, or the systems are too complex and requires water pump contractors?

Thanks for the fast reply.

This is the panel box. Two pumps automatic alternate one after another.


The 5 red arrows are the relay indicated to be the problem (of old age failing).

This post has been edited by ashburn98: Jan 4 2021, 10:06 PM

The Cikachi link is very helpful and I am checking out Relpot relay specs sheet as well.

This below is another picture focused more on the wires. The contractor didn't mention corrosion, so probably not.



The quirky problem is when you turn the selector switch either way and turn it back, the system works fine and both pumps works (for a few days or one week) and then revert back to not working. Turn the selector switch again and it works again for a few days. There is no power trip. This is the reason the contractor speculate 'faulty old relays' as the cause.