Cosmo knob question?

zionfarm · **Posted:** Tue May 22, 2012 6:39 pm

Sup guys, I have looked high & low trying to figure out something on my Cosmo.
What does this knob do man?

http://youtu.be/y0kyKejNgGs?hd=1

beans161 · **Posted:** Tue May 22, 2012 7:28 pm

Dash light dimmer control? turn your lights on and try it. :wink:

zionfarm · **Posted:** Tue May 22, 2012 7:37 pm

beans161 wrote:

Dash light dimmer control? turn your lights on and try it. :wink:

Nope it's not that knob is to the left.. I know because my dimmer knob works.

Chuxa · **Posted:** Tue May 22, 2012 9:03 pm

I havnt got knob like this in mine i thought that it dash dimmer but u have another one for it so i can recommend to try to look under dash and figure out where its going and try to understand is it original or aftermarket.

zionfarm · **Posted:** Tue May 22, 2012 9:28 pm

Chuxa wrote:

I havnt got knob like this in mine i thought that it dash dimmer but u have another one for it so i can recommend to try to look under dash and figure out where its going and try to understand is it original or aftermarket.

You know I have never looked behind the knob. Yes the knob is stock, also the car is a California car so I don't know if that means anything

la23srx4 · **Posted:** Wed May 23, 2012 7:42 am

Its you air conditioning cool to cold control,i have a identical knob in my Rx4 in witch a/c works great !
Counterclock wise cool - Clock wise cold.
Cheers

J

zionfarm · **Posted:** Wed May 23, 2012 6:35 pm

la23srx4 wrote:

Its you air conditioning cool to cold control,i have a identical knob in my Rx4 in witch a/c works great !
Counterclock wise cool - Clock wise cold.
Cheers

J

I was thinking of this also. But for some reason my AC does not work and I'm going to hot ass Arizona.

philip · **Posted:** Wed May 23, 2012 9:14 pm

Yep, definitely AC thermostat control. The thermostat has a capillary tube that is positioned
either inside the evaporator coil or in front of it. Once the set temperature is reached the thermostat
cuts power to the AC pump until the temperature rises again and reactivates the pump.

If your AC isn't working, check fuses to internal blower fan. Generally accessory power is taken from
low fan speed to activate the AC system. Power is then routed through the thermostat which is what
activates/de-activates the AC pump clutch.

If you have 12V inside the car, check that the AC pump clutch wire has 12V when the AC is running.
If no, then check to see if the filter drier(black canister normally, new ones are raw aluminium), about 8" long and about 3" in diameter
with a little sight glass in the top of it, has a pressure switch in it. If yes, then you may have low/no gas,
in which case the clutch on the pump will not activate - to protect the pump.

If no, you don't have a low pressure switch in the system, then still check for 12V to the pump. If you have 12V to the pump
and it still doesn't work, then either the field coil( this is what energises and pulls the clutch in) or the pump are FUBAR!

weandsta1d · **Joined:** Thu May 24, 2012 3:09 am **Posts:** 2

zionfarm wrote:

la23srx4 wrote:

Its you air conditioning cool to cold control,i have a identical knob in my Rx4 in witch a/c works great !
Counterclock wise cool - Clock wise cold.
Cheers

J

I was thinking of this also. But for some reason my AC does not work and I'm going to hot ass Arizona.

a great help to my car. thanks for the two of you for posting it.

zionfarm · **Posted:** Fri May 25, 2012 9:51 am

philip wrote:

Yep, definitely AC thermostat control. The thermostat has a capillary tube that is positioned
either inside the evaporator coil or in front of it. Once the set temperature is reached the thermostat
cuts power to the AC pump until the temperature rises again and reactivates the pump.

If your AC isn't working, check fuses to internal blower fan. Generally accessory power is taken from
low fan speed to activate the AC system. Power is then routed through the thermostat which is what
activates/de-activates the AC pump clutch.

If you have 12V inside the car, check that the AC pump clutch wire has 12V when the AC is running.
If no, then check to see if the filter drier(black canister normally, new ones are raw aluminium), about 8" long and about 3" in diameter
with a little sight glass in the top of it, has a pressure switch in it. If yes, then you may have low/no gas,
in which case the clutch on the pump will not activate - to protect the pump.

If no, you don't have a low pressure switch in the system, then still check for 12V to the pump. If you have 12V to the pump
and it still doesn't work, then either the field coil( this is what energises and pulls the clutch in) or the pump are FUBAR!

Wow I must say you hit the nail on the head or what ever that saying is.
Thank you so much for the insite my good my good man.

philip · **Posted:** Sat May 26, 2012 2:01 am

If the info helps you getting your A/C to work, then I'm happy!
Once you've had working air con in your car, you don't willingly live without it - especially in hot weather or its de-mist function in cold weather!

Cosmo knob question?

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