Trying to follow advice on other thread, here's what's on the side of the
It's clearly not a relay - maybe a capacitor ?
I notice there are lots of gubbins as shown on eBay, called (incorrectly)
Could this be the cause of my problem (failed by letting the refridgerant
Alternatively, what's needed to verify it as working/not working ?
On Tue, 12 Jun 2018 15:39:14 -0000 (UTC), Jethro_uk
It is a relay, commonly known as a current relay or start relay.
for a typical wiring diagram.
The purpose of the current (start) relay is to switch in the start
winding on the motor and then disconnect it and power the run winding
instead. If the compressor seizes (the usual failure) you will hear
the start relay clicking every few minutes as it attempts to start
followed by the overload switch shutting it down. When it has cooled
the cycle repeats. After a few tens of minutes of this the compressor
will be hot (often too hot to touch) as the start winding draws a lot
If you can hear it clicking and the compressor producing no noise and
is hot to touch but no cooling is happening it probably isn't the
cause. You can listen to the compressor by putting a length of dowel
or a long screwdriver against the case with the other end close
against you ear.
If there is no clicking and the compressor remains cool it may have
failed and trying a new one isn't going to cost a huge amount so may
be worth trying.
The relay doesn't connect to the refrigerant circuit so it is unlikely
positioning the unit will have any effect except that if you created a
fluid lock in the compressor the continued cycling of the current
relay may have damaged it.
On Wed, 13 Jun 2018 07:36:29 -0000 (UTC), Jethro_uk wrote:
Does the motor run at all with the clicking? Use the
screwdriver/dowel trick from the caseing to your ear, push the end of
the screwdriver (handle end!) against the flappy bit in front of your
ear canel and flex that to seal the canel. Place the other end firmly
in contact with the compressor caseing.
Silence apart from the clicks means that no power is being used,
something is open circuit.
Clicks and quiet gentle hum, power is being used but the motor isn't
rotating. Seized or hydralically locked?
Clicks and rapid pulsating sound, motor is running and pumping. Note
it might not actually run for long if there is oil where there
I'd be tempted to stop messing about with it put it in the correct
orientation and forget about it for a week or so. Give the oil a
chance to drain back...
On Wed, 13 Jun 2018 09:13:15 +0100, Dave Liquorice wrote:
OK, so it's had a week ...
Turning it on, the compressor is silent (ear to screwdriver trick) for
about a minute. Then there's a click from the relay at which point
there's a gentle hum from the compressor in my ear for about half a
second. Then the relay clicks and it's silent again.
It *sounds* like it's not getting the extra kick to start ? If so, that's
a dead ringer for a failed relay ?
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