A/C not cold
#31
Guest
Posts: n/a
Re: A/C not cold
Eric did pass the time by typing:
> What doors are you talking about? By the way, this is in a 99 TJ (and the
> system uses R134, I'm sure). I'll do as much of that checking as I can.
There are doors (valves) in the AC system that change how much air goes
past the coil and how much goes past the heater core (called a blend door) as
well as a set of doors that determine what goes where (floor, bi, vent, defrost, etc)
These mostly run on vacuum (or mechanical linkages in older models).
If there isn't enough vac (leak in the system somewhere or disconnected line)
they tend to stay shut. It's hard to say for sure without the service book
or knowing what you have in there.
If it is a leak it can be anywhere. Check to see if it cycles properly first
then press with looking for leaks. A big vac leak will also cause a rough idle
condition.
--
DougW
> What doors are you talking about? By the way, this is in a 99 TJ (and the
> system uses R134, I'm sure). I'll do as much of that checking as I can.
There are doors (valves) in the AC system that change how much air goes
past the coil and how much goes past the heater core (called a blend door) as
well as a set of doors that determine what goes where (floor, bi, vent, defrost, etc)
These mostly run on vacuum (or mechanical linkages in older models).
If there isn't enough vac (leak in the system somewhere or disconnected line)
they tend to stay shut. It's hard to say for sure without the service book
or knowing what you have in there.
If it is a leak it can be anywhere. Check to see if it cycles properly first
then press with looking for leaks. A big vac leak will also cause a rough idle
condition.
--
DougW
#32
Guest
Posts: n/a
Re: A/C not cold
Eric did pass the time by typing:
> What doors are you talking about? By the way, this is in a 99 TJ (and the
> system uses R134, I'm sure). I'll do as much of that checking as I can.
There are doors (valves) in the AC system that change how much air goes
past the coil and how much goes past the heater core (called a blend door) as
well as a set of doors that determine what goes where (floor, bi, vent, defrost, etc)
These mostly run on vacuum (or mechanical linkages in older models).
If there isn't enough vac (leak in the system somewhere or disconnected line)
they tend to stay shut. It's hard to say for sure without the service book
or knowing what you have in there.
If it is a leak it can be anywhere. Check to see if it cycles properly first
then press with looking for leaks. A big vac leak will also cause a rough idle
condition.
--
DougW
> What doors are you talking about? By the way, this is in a 99 TJ (and the
> system uses R134, I'm sure). I'll do as much of that checking as I can.
There are doors (valves) in the AC system that change how much air goes
past the coil and how much goes past the heater core (called a blend door) as
well as a set of doors that determine what goes where (floor, bi, vent, defrost, etc)
These mostly run on vacuum (or mechanical linkages in older models).
If there isn't enough vac (leak in the system somewhere or disconnected line)
they tend to stay shut. It's hard to say for sure without the service book
or knowing what you have in there.
If it is a leak it can be anywhere. Check to see if it cycles properly first
then press with looking for leaks. A big vac leak will also cause a rough idle
condition.
--
DougW
#33
Guest
Posts: n/a
Re: A/C not cold
Eric did pass the time by typing:
> What doors are you talking about? By the way, this is in a 99 TJ (and the
> system uses R134, I'm sure). I'll do as much of that checking as I can.
There are doors (valves) in the AC system that change how much air goes
past the coil and how much goes past the heater core (called a blend door) as
well as a set of doors that determine what goes where (floor, bi, vent, defrost, etc)
These mostly run on vacuum (or mechanical linkages in older models).
If there isn't enough vac (leak in the system somewhere or disconnected line)
they tend to stay shut. It's hard to say for sure without the service book
or knowing what you have in there.
If it is a leak it can be anywhere. Check to see if it cycles properly first
then press with looking for leaks. A big vac leak will also cause a rough idle
condition.
--
DougW
> What doors are you talking about? By the way, this is in a 99 TJ (and the
> system uses R134, I'm sure). I'll do as much of that checking as I can.
There are doors (valves) in the AC system that change how much air goes
past the coil and how much goes past the heater core (called a blend door) as
well as a set of doors that determine what goes where (floor, bi, vent, defrost, etc)
These mostly run on vacuum (or mechanical linkages in older models).
If there isn't enough vac (leak in the system somewhere or disconnected line)
they tend to stay shut. It's hard to say for sure without the service book
or knowing what you have in there.
If it is a leak it can be anywhere. Check to see if it cycles properly first
then press with looking for leaks. A big vac leak will also cause a rough idle
condition.
--
DougW
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