BYPASS VALVE is either connected backwards or faulty - Saab 9-5 Bulletin Board - Saabnet.com
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When the temp is on LO the bypass valve closes so the coolant shouldn’t be flowing through the silver pipes and heater core. On HI they should be hottest as the coolant enters the pipes and core. N It sounds like you are getting the opposite.
Double check the hose connections first - some of the parts sites have photos of the Bypass valve and the rats nest of hoses that can help you see which valve port and which hose belong together. Also make sure the vacuum lines are connected on the valve and solenoid. If they are correct, you may have a bum valve.
Won’t solve the 08 issue, but should at least get the hot coolant into the right place as a start.
Good luck.
~pme
Posts in this Thread:
- AC code 08 and no heat, wrctkc , Fri, 3 Mar 2023 09:06:47
- fixed .....againt, wrctkc , Wed, 7 Jun 2023 08:07:51
- No codes and still no heat, wrctkc , Wed, 29 Mar 2023 10:30:39
- Re: AC code 08 and no heat, wrctkc , Thu, 16 Mar 2023 13:21:44
- Re: AC code 08 and no heat, pme , Sat, 4 Mar 2023 06:14:28
- Re: AC code 08 and no heat, , Fri, 3 Mar 2023 13:01:01
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