The Hi pressure alarm
is what happens when it does not get enough flow. It overheats then shuts itself down so the good news is the unit sounds fine. It's supposed to do that rather than burn itself up and it should not have any damage.
Something that happened to me was a lot of growth at the through hull
. So you might want to check to be sure you have a good flow at the through hull
. I've done things where I would disconnect the supply to the pump and connect it to a garden hose and use the city water
pressure to blow it out. That works a little bit but usually means there is another issue with growth or the pump.
If it is just a flow issue then I would ask what type of pump you have. If it's the one with a silver body then it probably is a Cal
pump - they are terrible. They eventually fail and can not be repaired so don't try. You would do better to get a March pump. Yes, they cost more. They have a separate pump head
all nylon and you can replace the head
for about $70 instead of the whole pump. Try to keep the salt water
line as short as possible since you can get growth in the lines and just has more resistance. If the line is just too long then you would need a bigger pump. Don't forget the outflow too. restricted outflow is as bad as restricted in flow.