AC blows hot after Coolant flush
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Senior Member
Joined: Jul 2011
Posts: 426
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From: Sacramento, CA
2005 Granite Gray C55
AC blows hot after Coolant flush
As mentioned in the title, I had to do three parts to this job. I had to replace my alternator, coolant expansion tank, and radiator cooling fan all in one go.
I had to drain the coolant to remove the fan > expansion tank > alternator. Upon reinstalling everything and filling up the coolant, i ran the fan on high, heat on low, and coolant expansion tank cap off for 25 minutes.
The AC now doesn't blow cold, just warm ambient - hot air temperature.
Any suggestions on what the issue may be? I know it's a closed loop system so I shouldn't have lost or had issues with the AC but I could be wrong. 🤷
I had to drain the coolant to remove the fan > expansion tank > alternator. Upon reinstalling everything and filling up the coolant, i ran the fan on high, heat on low, and coolant expansion tank cap off for 25 minutes.
The AC now doesn't blow cold, just warm ambient - hot air temperature.
Any suggestions on what the issue may be? I know it's a closed loop system so I shouldn't have lost or had issues with the AC but I could be wrong. 🤷
