I just happen to be at the side of my house yesterday and I noticed on
my 19 year old Carrier unit the fan was running but not the compressor.
About 10 seconds later the compressor came on and ran continuosly with
I have never seen this before.My house has been staying cool. The
system is properly charged. A friend told me the thermal overload on
the compressor could have caused it to go out. And he also suggested to
me to clean the coil with a water hose as the coils might be clogged
up, causing the compressor to overheat. Is there any other reason why
the compressor would cut out? And also is it a good idea to clean the
coil with a hose?
Sounds like the compressor is going bad. Just changed out a VERY
similar unit on one of my rental properties. Call the company who
serviced it for their opinion, but it sounds like it is time to replace
it. The other important thing to note is that the efficiency standard
is going up as of January 1st, 2006. This means that you can still
replace the unit with a 10 SEER unit this year, but would need to go
with a 13 SEER (much more expensive) unit next year. Obviously, it
might make sense to go with the more efficient unit, this is just food
Cleaining with a hose may just impact more debris into the coil,
particularly since you state its 19 years old...sheesh man...its past its
life expectancy..things that are not serviced regularly break...and things
that are run past their normal life span will fail.
The compressor does have a thermal overlimit switch in it, but that unit
might also have a low pressure switch, or a high pressure cut out switch
that COULD remove the compressor from the line and allow the fan to run.
Suggest that this is NOT a DIY repair, and that if you are worried about it,
to call in a licenced pro.
A proper coil clean will involve a foaming cleaner that in most states, the
un-licenced can not buy direct.
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