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Old 09-11-2003, 12:34 AM
300sd2000 300sd2000 is offline
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Join Date: Sep 2000
Posts: 97
I'm having EXACTLY the problem described....will it apply to to a 126 system? Sudden inconsistent bursts of hot air when AC while at other times everythings cool (AC)

The Monovalve appears to be working (can feel movement in capsule when removing/reconnecting connctor on it) so I am thinking that the aux water pump might be the problem...heat is rarely in SoCal so I think disconnectng it would be no major problem.

Someone said that a failed aux pump will short out the PBU? Is this really the case even on 126's?

I would like to go try this solution, soon as I get my major oil leak problem fixed (completely unrelated problem)

How do I disconnect it on a 126--it looks like its deep behind the firewall

1) 84 300SD 285K+ Miles (Ver Calif)
2) 84 300SD 175K+ Miles (Ver Federal)
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