crouse

I have a '99 GS300. I have researched posts on here before but am not sure what I am looking for. I am assuming a servo motor but not sure which one. I get a clicking gurgling sound behind the dash. This only happens when the outside temperature is 70ish or above. It doesn't matter if AC is on or not or even if the motor is running.

Any advise appreciated.

jjbenzo

The clicking noise is probably 1 of your 3 a/c servo motors. Not sure about the gurgling noise.

KeyKeeper

gurgling is most likely low coolant level. ^^^ what he said about the clicking. Most likely the blend servo motor.

crouse

I appreciate the quick response. I wouldn't call it a gurgle in a radiator sense but more the clicking. Which would be the "blend"servo. Can I access it from glove box or go behind center dash (AC vents Head unit)?

Thanks again.

sakataj

iTrader: (182)

there are 4 servos.....1 on drivers side and 3 on passenger side

OP please dont make new posts without searching. every issue you ever can come across has been addressed someplace on here

Blanco

iTrader: (8)

Read this. Then if you still have any questions, ask away.

8ll8lack

iTrader: (8)

and if you're not good with searching the problem. Try search "sakataj" screen name. Most of all known problem with the GS will pop up.

wbmx1981

My no cold air issue was my passenger air mix servo, my "clicking" noise was my mode servo.

lexo98

iTrader: (2)

If the clicking by any chance sounds like pebbles are hitting your firewall it's low coolant.

KeyKeeper

Easy way to tell is to pull the glove box out completely, turn key on and wait. Once it starts clicking, you can put your hand on the servos and narrow down which it is. You should feel it clicking/vibrating. Low coolant will cause a very similar sound as well but mainly on acceleration as the water pump spools up putting more output to the heater system and the trapped air makes the gurgling sound as it passes through the heater core. I had a Z71 do this forever and I thought the AC drain was plugged up filling the box with water.....changed radiator and bang, noise was gone. Your problem is the servos though. They most likely need removed and greased. Again, search before new thread or you will get the negative responses. Hope this helps.