Drivers Servo motor 98 GS300
#1
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Location: Illinois
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Drivers Servo motor 98 GS300
So after reading all the posts on heat and cooling and the four servos, I had my drivers temperature servo replaced. The entire drivers side blew cold air only no matter the temperature or mode.
After changing the servo and testing both before replacing the old one, the mechanic got readings of 135 degrees on the passenger vent and 108 degrees from the drivers vent (inside the shop) - a major improvement although not what he or I expected. So I drove home.
On the way home I played with the settings and now I still get cold air from the drivers vent and floor. Outside temp 37 degrees.
Pulled into my garage and turned the climate control off. You can still cycle through the modes even with the system off (engine still running). I hear the gate changing behind the vents - should I hear two?
So if it's not the temp servo, what would prevent heat from reaching the drivers side? Why did the mechanic get 108 degrees inside the shop? Is this just my imagination???
Thanks for all your help!
After changing the servo and testing both before replacing the old one, the mechanic got readings of 135 degrees on the passenger vent and 108 degrees from the drivers vent (inside the shop) - a major improvement although not what he or I expected. So I drove home.
On the way home I played with the settings and now I still get cold air from the drivers vent and floor. Outside temp 37 degrees.
Pulled into my garage and turned the climate control off. You can still cycle through the modes even with the system off (engine still running). I hear the gate changing behind the vents - should I hear two?
So if it's not the temp servo, what would prevent heat from reaching the drivers side? Why did the mechanic get 108 degrees inside the shop? Is this just my imagination???
Thanks for all your help!
#2
Pole Position
iTrader: (1)
So after reading all the posts on heat and cooling and the four servos, I had my drivers temperature servo replaced. The entire drivers side blew cold air only no matter the temperature or mode.
After changing the servo and testing both before replacing the old one, the mechanic got readings of 135 degrees on the passenger vent and 108 degrees from the drivers vent (inside the shop) - a major improvement although not what he or I expected. So I drove home.
On the way home I played with the settings and now I still get cold air from the drivers vent and floor. Outside temp 37 degrees.
Pulled into my garage and turned the climate control off. You can still cycle through the modes even with the system off (engine still running). I hear the gate changing behind the vents - should I hear two?
So if it's not the temp servo, what would prevent heat from reaching the drivers side? Why did the mechanic get 108 degrees inside the shop? Is this just my imagination???
Thanks for all your help!
After changing the servo and testing both before replacing the old one, the mechanic got readings of 135 degrees on the passenger vent and 108 degrees from the drivers vent (inside the shop) - a major improvement although not what he or I expected. So I drove home.
On the way home I played with the settings and now I still get cold air from the drivers vent and floor. Outside temp 37 degrees.
Pulled into my garage and turned the climate control off. You can still cycle through the modes even with the system off (engine still running). I hear the gate changing behind the vents - should I hear two?
So if it's not the temp servo, what would prevent heat from reaching the drivers side? Why did the mechanic get 108 degrees inside the shop? Is this just my imagination???
Thanks for all your help!
Good luck.
#4
Driver
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Join Date: Aug 2004
Location: Illinois
Posts: 77
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Well, I now have heat on the driver's side!
Here's what happened:
I had heat on the passenger but not the drivers side.
Replaced the diver's side servo motor with a part from Sewell ($140)
Paid my guy at Pep Boys (he used to own and work on Lexus) to replace servo ($130)
Did not fix problem. My buddy recommended that I visit his friends at a specific Lexus dealer for a diagnosis since Pep Boys does not have the equipment to diagnose.
Paid Lexus dealer to diagnose and give an estimate to repair ($139/hour). No electrical problems, so they recommended a power flush as next step. They gave me a sample of my coolant - it was green/brown. It was only 1 1/2 years old! Tech said maybe last guy put in wrong coolant. It should be Toyota pink/red.
Pep Boys does power flush, but my guy said that they run all mfrs coolant through system while Lexus uses only Toyota, a big concern. Did power flush at Lexus ($120) and - voila! heat to both sides!!
My Pep Boys guy said that using wrong or mixing coolant with Toyota coolant can cause gelling and clog heater core.
Total cost - $529.
If I could do it again, with heat on one side and not the other, I would do the power flush first, then diagnose the servo motor functions and replace as necessary. You car geeks might do it differently. I didn't know I had the wrong coolant - I don't do any servicing myself cuz I'm old now. I have to rely upon others.
Hope this helps somebody and saves you some $$!
Here's what happened:
I had heat on the passenger but not the drivers side.
Replaced the diver's side servo motor with a part from Sewell ($140)
Paid my guy at Pep Boys (he used to own and work on Lexus) to replace servo ($130)
Did not fix problem. My buddy recommended that I visit his friends at a specific Lexus dealer for a diagnosis since Pep Boys does not have the equipment to diagnose.
Paid Lexus dealer to diagnose and give an estimate to repair ($139/hour). No electrical problems, so they recommended a power flush as next step. They gave me a sample of my coolant - it was green/brown. It was only 1 1/2 years old! Tech said maybe last guy put in wrong coolant. It should be Toyota pink/red.
Pep Boys does power flush, but my guy said that they run all mfrs coolant through system while Lexus uses only Toyota, a big concern. Did power flush at Lexus ($120) and - voila! heat to both sides!!
My Pep Boys guy said that using wrong or mixing coolant with Toyota coolant can cause gelling and clog heater core.
Total cost - $529.
If I could do it again, with heat on one side and not the other, I would do the power flush first, then diagnose the servo motor functions and replace as necessary. You car geeks might do it differently. I didn't know I had the wrong coolant - I don't do any servicing myself cuz I'm old now. I have to rely upon others.
Hope this helps somebody and saves you some $$!
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