On Sun, 04 Nov 2007 18:10:31 +0000, jthread wrote:
One way would be to look at the contact points and see if they are closed
when the water is cold enough to need heat. But not having a picture of
this switch in my head doesn't help me to help you much. Do you have a
On my Pentair gas heater this is a diaphram and a microswitch. I am
pretty sure I could just replace the switch, never had it go bad.
Be sure you get this working and don't just jumper it out. It is an
important safety function to be sure you have water flowing in the
system before you turn on the heat.
If you are going to replace the switch anyway, take it off, take it apart if
possible and look for defects. Something mechanical that is popped out of place,
or corroded switch contacts. Re-assemble it correctly, clean the contacts and
see if it works right.
Thinking more, look first for plugged passages which would prevent pressure from
getting to the actuator.
just checked it pressure was fine. it's also working fine, i'll try
tomorrow. i was trying to turn the spa on so it probably dropped when i
changed the valve for settings. i think it's a combination of pressure and
maybe clogged lines to the switch.
to be continued...
No experience with pressure switches other than the fact that I replaced
one in my pool heater when it started leaking.
My experience with pool heaters is that all the parts wear out and it
doesn't take long before you have to replace the whole thing.
I've replaced most of the parts and last year so many major parts were
worn out or rusted out, I had to replace the whole thing. Apparently
the combination of heat, water, and being outdoors all winter is
pretty hard on them.
Never had a $52 repair. All my repairs were way over that.
Make sure to keep the PH near neutral.
your right about my heater. it's about 25 y/o. and it's outside uncovered.
the people that lived here before never used it. they thought it was beyond
repair. it only needed a pressure switch. i don't think they used the pool
at all. i found that switch on the internets for $27. still expensive but
quite a difference.
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