hot front cold rear

[russell]

i just got a 99 yukon and front air is warm and rear is cold and i have a 3 yr old with leukemia so need to figure it out the drier i believe it is the silver canister under the hood isnt getting cold either but i was told to check if the compressor is kicking on and off rapidly while truck is at idle and its not so they said seems like freon is good i was told to check the blend door but with the canister not getting cold could it be that the o-tube is stopped up and needs replacing any help would be great

 

[SunlitComet]

if you hear the blend/temp door move normally then likely an o-tube issue. probably has leak stop dumped in at one point.

 

[russell]

Thanks

---------- Post added at 11:17 AM ---------- Previous post was at 11:15 AM ----------

So what is causing the drier canister not to get cold

 

[SunlitComet]

possibly because if the o-tube is plug there is no flow for the freon to do what it does and hence no cold area or hot ares that are clearly different so warm evap and canister maybe bit warmer near engine.

 

[russell]

Ok thanks

 

[russell]

yea i dont think the blend door is moving

 

[SunlitComet]

then perhaps the control head is bad.

 

[russell]

what is the control head

 

[SunlitComet]

control panel with buttons and knobs on it. you touch it to change settings.

---------- Post added at 04:38 AM ---------- Previous post was at 04:37 AM ----------

can be tested to some extent.