sorry. we have a Fujitsu system with 3 room units that we put in  about 10
years ago. no trouble at all.  granted we may not use AC as much as you do
in SC. Ours will heat down to about 30F.


On Mon, Jul 11, 2022, 5:35 PM Floyd Thursby via Mercedes <
mercedes@okiebenz.com> wrote:

> I have this mini-split system.  Actually I have 3 of them, LGs.  I was
> away Saturday, I come home and the house is warm.  I see the indoor
> units on one system flashing error codes.  I look up error codes.  The
> code tells me "Outdoor unit condenser coil middle thermistor has
> disconnected or shorted out."  OK fine, I'll order a new thermistor.
> There are 2 thermistors, neither of which is called "condenser coil
> middle thermistor" and the parts diagram is no help.  I have downloaded
> the service manual and of course it does not specify which of the
> thermistors is the "middle thermistor" per the error code. There is some
> convoluted process to test whether a thermistor is working or not,
> requires setting various temperatures etc. Incredibly time consuming and
> fiddly.  And I don't even know why a thermistor would fail but there you
> go.
>
> So I call LG parts number and after spending hours talking to a coupla
> customer service people and waiting on hold to finally get transferred
> to tech support because all they can tell me is that there are two
> thermistors (duh) and they don't know which is the correct one.  I
> finally get through to a tech support guy who is rude as hell, all he
> wants to do is give me a number to call to get a tech to come out and
> figure out what part needs to be replaced.  No thanks.  After going
> around with him I finally tell him I have one question for him to
> answer.  OK he says.  I ask him which of these parts is the "middle
> thermistor."  He doesn't know.  He tells me I should replace ALL the
> thermistors in the system whether it is 5 or 3 or 2, that is what the
> tech would do.  Right, that would probably cost me $500 for a guy to
> dick around replacing a $23 part, or a $32 part if he would even have it
> or know what to do, and he would charge me $150 per part plus labor etc.
>
> Anyway I ordered 2 thermistors off Amazon that should be here in a week
> maybe, or sooner.  Bah.
>
> This should not be this hard.  Lesson though, I will never buy an LG
> unit again, their support is absolute shite.  Maybe some of the other
> vendors are better, I guess I will check that out the next time I need
> to get another mini-split unit.
>
> --
> --FT
> _______________________________________
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