GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

no heat!!!!!!!!!!!!Help

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Old 11-24-10, 10:55 PM
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criminalR1
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Default no heat!!!!!!!!!!!!Help

hey whats up guys well i have another delema my car has proper operating temp and a new thermostat installed but I get no heat in the car just cold air....any suggestions???? I'm was thinking of just putting in another new thermostat just to make sure I didn't get a faulty one...but don't know if this would fix the problem
Old 11-25-10, 04:07 AM
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GSJake
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Have you checked the servo motor that controls the hot and cold? Its in the dash... there are some write up's on here about it.
Old 11-25-10, 04:51 AM
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that sucks
Old 11-25-10, 02:50 PM
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AYEmike
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do you have the monstrous rattler behind the dash, mine makes me wanna smack my dash with a baseball bat. most likely your servo motor is malfunctioning like mine.
Old 11-26-10, 02:13 AM
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criminalR1
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Originally Posted by GS3mike
do you have the monstrous rattler behind the dash, mine makes me wanna smack my dash with a baseball bat. most likely your servo motor is malfunctioning like mine.
no rattle it sound's and blows like normal...minus the heat....and I live in WI so heat is definitely a priority right now .....I'll have to check out the servo motor ....is it a pain in the *** to get to/replace??
Old 11-26-10, 04:36 PM
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AshburnM3
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may i ask why did you change the thermostat to begin with? was there heat before you change it? did you install the thermostat correctly-facing the right way?
Old 11-26-10, 04:54 PM
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also check if you got enuff coolant in your system... that could be another cause of this.
Old 11-27-10, 01:37 PM
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criminalR1
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Originally Posted by AshburnM3
may i ask why did you change the thermostat to begin with? was there heat before you change it? did you install the thermostat correctly-facing the right way?
no there was no heat thats why I figured I'd start with the thermostat and yes it is installed correctly...
Old 11-27-10, 01:38 PM
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criminalR1
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Originally Posted by GS300ToM
also check if you got enuff coolant in your system... that could be another cause of this.
She's full......
Old 11-27-10, 05:10 PM
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AshburnM3
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ok, does the lower rad hose feel as hot as the upper rad hose? does the rad fan come on and temp gauge stays normal? if yes to both of them, then you need to check if the heater hoses is blocked/clogged. i would disconnect the inlet and outlet hoses, use a blow gun to blow inlet side of the heater core and watch the other end for coolant to come out. if you dont have air supply then use a garden hose instead, good luck.
Old 11-27-10, 08:27 PM
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lexo98
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if you have air trapped in the system your heater won't work. After you repaced the thermostat did you bleed the air out of the cooling system?
Old 11-28-10, 05:00 PM
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criminalR1
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ok well I turns out that both my servos decided to die ..... I tweaked the plastic arm enough to removed the pin from the adjuster and turned the flap manually by hand and walla!!!! out came some sweat u out the car heat....so looks like I be replacing the servos in the near future
Old 11-28-10, 05:45 PM
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KingNasGS4
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Heater core could also be a possibility but I really hope not
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