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gauge readings

Posted: Mon Oct 12, 2020 5:12 pm
by penguins25
my ac in my 08 mgm doesnt work on normal ac
it does work somewhat on max ac

i put my guages on it and this is the readings
low side read 125 constant
high side was going from 200 to 300 cycling

Re: gauge readings

Posted: Mon Oct 12, 2020 7:33 pm
by bohica2xo
What exactly is an "mgm"?

It sounds like a coupler malfunction. Low side.

Re: gauge readings

Posted: Mon Oct 12, 2020 7:40 pm
by penguins25
mercury grand marquis

Re: gauge readings

Posted: Mon Oct 12, 2020 7:45 pm
by penguins25
whats a coupler?

Re: gauge readings

Posted: Tue Oct 13, 2020 2:28 am
by Dougflas
The low side fitting on the hose does not sound as if it has the proper connection.

Re: gauge readings

Posted: Tue Oct 13, 2020 3:14 am
by Cusser
penguins25 wrote:my ac in my 08 mgm doesnt work on normal ac
bohica2xo wrote:What exactly is an "mgm"?
Penguins, you assumed we would know what "mgm" means????
Image

Re: gauge readings

Posted: Tue Oct 13, 2020 9:14 am
by penguins25
please help yall
i really want to fix my ac and dont know where else to go

new readings

Posted: Tue Oct 13, 2020 3:21 pm
by penguins25
just went out there and put the gauges on and here is what i got
low side 75-150
high side 300-500

both sides cycle back and forth through them numbers

my ac blows cool not cold

edit:
these readings were taken on max ac
theres a normal ac setting i can put it on but the ac doesnt blow as cool on this setting
i can go take anorther reading on normal if this would be helpful

Re: gauge readings

Posted: Tue Oct 13, 2020 5:29 pm
by Dougflas
Readings are too high. Spray the condenser with a water hose while monitoring the high side pressure. Does it drop like a rock? If so, start by checking airflow across condenser. Check the cooling fan also. If the high side drops, does the low side drop also?

Re: gauge readings

Posted: Wed Oct 14, 2020 2:59 pm
by penguins25
i put the gauges on and got the water hose

its doing the exact same thing as before its going back and forth between
low side 75-150
high side 300-500
the water on the condenser does not drop the readings