My son called last night to say his central AC wasn't cooling . Went over
early this am and found that the fuse had seriously overheated , to the
point that the contact has lost tension and no longer grips the tab on the
fuse carrier (he's calling a 'lectrician today to replace it with a breaker
panel) . I rewired the AC over to the stove fuse , and neither the
compressor or fan will come on . Meter checks tell me that when he turns it
to "cool" the relay engages , and there's power to the motors - 247V
unloaded , drops to 230+- when the relay closes .
I suspect that due to poor contacts , the voltage drop at the unit has
burned up both the fan and compressor motors ... anybody out there with
experience in the field that can shed more light on this ?
I considered that maybe the capacitor has gone bad , but I'm not sure ,
and that wouldn't(shouldn't ?) cause the overheating problem in the fuse box
. We're having record high temps here , and I surely don't have room for him
and his two roomies at my house , since the eldest and his spawn have moved
back in .
--
Snag
Learning keeps
you young !
Posted by DM on August 4, 2011, 1:25 pm
On 8/4/2011 9:36 AM, Snag wrote:
> I considered that maybe the capacitor has gone bad , but I'm not sure , > and that wouldn't(shouldn't ?) cause the overheating problem in the fuse box
Check this video:
There's lots of other sites that have info, google "how to check ac
capacitor"
He mentions that a bad fuse would cause excessive current draw from the
compressor, that would cause overheating of the fuse. Is it the right
fuse? You'd think the fuse would blow before the panel would overheat.
I had a bad capacitor a few years ago that prevented the AC from starting.
--
Fins BS#221 AH#135
Hoodlum #43
2007 FLHTCU
Posted by DM on August 4, 2011, 1:34 pm
On 8/4/2011 10:25 AM, DM wrote:
> On 8/4/2011 9:36 AM, Snag wrote: >> I considered that maybe the capacitor has gone bad , but I'm not sure , >> and that wouldn't(shouldn't ?) cause the overheating problem in the >> fuse box > Check this video: > > There's lots of other sites that have info, google "how to check ac > capacitor" > He mentions that a bad fuse would cause excessive current draw from the > compressor, that would cause overheating of the fuse. Is it the right > fuse? You'd think the fuse would blow before the panel would overheat. > I had a bad capacitor a few years ago that prevented the AC from starting.
Sorry, meant bad capacitor.
--
Fins BS#221 AH#135
Hoodlum #43
2007 FLHTCU
Posted by Snag on August 4, 2011, 3:14 pm
DM wrote:
> On 8/4/2011 10:25 AM, DM wrote: >> On 8/4/2011 9:36 AM, Snag wrote: >>> I considered that maybe the capacitor has gone bad , but I'm not >>> sure , and that wouldn't(shouldn't ?) cause the overheating problem >>> in the fuse box >> >> Check this video: >> >> >> There's lots of other sites that have info, google "how to check ac >> capacitor" >> >> He mentions that a bad fuse would cause excessive current draw from >> the compressor, that would cause overheating of the fuse. Is it the >> right fuse? You'd think the fuse would blow before the panel would >> overheat. I had a bad capacitor a few years ago that prevented the AC >> from >> starting. > Sorry, meant bad capacitor. > -- > Fins BS#221 AH#135 > Hoodlum #43 > 2007 FLHTCU
It was the cap . Talked to an AC guy , he said for under 20 bucks he'd try
that first , so I did .
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> and that wouldn't(shouldn't ?) cause the overheating problem in the fuse box