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Old 09-17-2009, 10:25 AM
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pavanbabut pavanbabut is offline
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Thumbs down A/C fan blower running at only two speeds

Hi all,

I recently did r134a retrofit on my svx by flushing all the hoses, removing cooling unit (evaporator unit) and replacing the seals in it. Once I put back everything, I recharged and it seems to be working fine except my blower motor doesnt change to Lo-Med-Hi settings. The only change I can see when I change between those settings is from Med-Hi (I can hear a relay clicking in this case, which I believe is the high speed relay on blower motor), but no change from Lo-Med or Med-Lo. When I ran the diagnostics test, it is giving me error code 13 and 14 which is sunload sensor circuit open/short and evaporator sensor circuit open/short. I dont understand why I get error 13 since I never touched sunload sensor.
Coming to evap sensor, it says the sensor is located below fan blower motor which I think is located above cooling unit and if I have to test it, I need to take out the cooling unit as its not accessible from bottom and this includes removing refrigerant .
Any ideas / suggestions.

thanks,
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