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Condenser problem?? Red 06-22-2007
|--> Re: Condenser problem?? Jeffrey Lebowsk...06-23-2007
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Posted by Red on June 23, 2007, 4:38 pm
> >I have a Heil 5000 hvac system. Live in the south where it's hot &
> >humid. Occasionally when the inside unit cycles off I hear the
> >condenser unit continue running for 30-45 seconds before it shuts
> >down. Seems to happen mostly when the outside temp is mid 90's or
> >hotter. Is this normal? I'm thinking possibly a cooldown for a hot
> >compressor? Or would it be a sticking contactor? It doesn't do it
> >all the time, or long enough to troubleshoot, so I'm left guessing.
> >Any constructive comments are appreciated.
>
> >Red
>
> Are you sure the outdoor unit is actually running after the indoor
> unit shuts down or are you just hearing the refrigerant still moving
> through the copper line set?
> Bubba

It's actually running. I can look out the window and see the fan
blades turning. Funny thing though is the relative consistancy of the
run-on time when it does it. I would think a sticking contactor would
be more variable in time. However I gave the contactor a good spraying
with contact cleaner & will see if there is any difference. If none,
I'll replace the contactor.
Red


Posted by on June 23, 2007, 4:53 pm

> > >I have a Heil 5000 hvac system. Live in the south where it's hot &
> > >humid. Occasionally when the inside unit cycles off I hear the
> > >condenser unit continue running for 30-45 seconds before it shuts
> > >down. Seems to happen mostly when the outside temp is mid 90's or
> > >hotter. Is this normal? I'm thinking possibly a cooldown for a hot
> > >compressor? Or would it be a sticking contactor? It doesn't do it
> > >all the time, or long enough to troubleshoot, so I'm left guessing.
> > >Any constructive comments are appreciated.
> >
> > >Red
> >
> > Are you sure the outdoor unit is actually running after the indoor
> > unit shuts down or are you just hearing the refrigerant still moving
> > through the copper line set?
> > Bubba
>
> It's actually running. I can look out the window and see the fan
> blades turning. Funny thing though is the relative consistancy of the
> run-on time when it does it. I would think a sticking contactor would
> be more variable in time. However I gave the contactor a good spraying
> with contact cleaner & will see if there is any difference. If none,
> I'll replace the contactor.
> Red


Why not call someone that KNOWS what's happening, that can diagnose the real
problem?




Posted by Zephyr on June 23, 2007, 5:18 pm
Kudos'!

--
Zyp

>
> > > >I have a Heil 5000 hvac system. Live in the south where it's hot &
> > > >humid. Occasionally when the inside unit cycles off I hear the
> > > >condenser unit continue running for 30-45 seconds before it shuts
> > > >down. Seems to happen mostly when the outside temp is mid 90's or
> > > >hotter. Is this normal? I'm thinking possibly a cooldown for a hot
> > > >compressor? Or would it be a sticking contactor? It doesn't do it
> > > >all the time, or long enough to troubleshoot, so I'm left guessing.
> > > >Any constructive comments are appreciated.
> > >
> > > >Red
> > >
> > > Are you sure the outdoor unit is actually running after the indoor
> > > unit shuts down or are you just hearing the refrigerant still moving
> > > through the copper line set?
> > > Bubba
> >
> > It's actually running. I can look out the window and see the fan
> > blades turning. Funny thing though is the relative consistancy of the
> > run-on time when it does it. I would think a sticking contactor would
> > be more variable in time. However I gave the contactor a good spraying
> > with contact cleaner & will see if there is any difference. If none,
> > I'll replace the contactor.
> > Red
>
>
> Why not call someone that KNOWS what's happening, that can diagnose the
real
> problem?
>
>
>



Posted by on June 23, 2007, 6:29 pm

>
>> > >I have a Heil 5000 hvac system. Live in the south where it's hot &
>> > >humid. Occasionally when the inside unit cycles off I hear the
>> > >condenser unit continue running for 30-45 seconds before it shuts
>> > >down. Seems to happen mostly when the outside temp is mid 90's or
>> > >hotter. Is this normal? I'm thinking possibly a cooldown for a hot
>> > >compressor? Or would it be a sticking contactor? It doesn't do it
>> > >all the time, or long enough to troubleshoot, so I'm left guessing.
>> > >Any constructive comments are appreciated.
>> >
>> > >Red
>> >
>> > Are you sure the outdoor unit is actually running after the indoor
>> > unit shuts down or are you just hearing the refrigerant still moving
>> > through the copper line set?
>> > Bubba
>>
>> It's actually running. I can look out the window and see the fan
>> blades turning. Funny thing though is the relative consistancy of the
>> run-on time when it does it. I would think a sticking contactor would
>> be more variable in time. However I gave the contactor a good spraying
>> with contact cleaner & will see if there is any difference. If none,
>> I'll replace the contactor.
>> Red
>
>
>Why not call someone that KNOWS what's happening, that can diagnose the real
>problem?
>
>

        MUCH too simple.


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Posted by Red on June 23, 2007, 10:41 pm

>
> Why not call someone that KNOWS what's happening, that can diagnose the real
> problem?

Because as I said in the original post, it's an "occasional"
occurance, as in "once or twice a week and not often enough to
troubleshoot". Why pay for a callout when chances are the problem
will not occur while the tech is there? My intent for the original
post was to ask if a rundown was normal for a hotter than normal
compressor and I got the answer of "no".
BTW, I have 50 years experience in instrumentation & control circuitry
and know well that when an intermittent problem occurs the best you
can do is make logical guesses. So I'm guessing a weak return spring
in the contactor or the thermostat. You may have other guesses, but
at this point I'm going to try mine first.

Red



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