I tried five different control units. I cleaned each one with contact cleaner. Could they all be bad?
Michael E. Esh On Nov 30, 2011, at 12:36 PM, Rich Thomas <richthomas79td...@constructivity.net> wrote: > Sounds like the control unit is not controlling. Might want to take it out > and see if anything on it (like maybe the wheel contacts) is corroded, > broken, fried, worn out, whatever. > > --R > > On 11/30/11 12:24 PM, Mike Esh wrote: >> I am still having trouble regulating heat in my 84 300D. I either get all >> heat or all cold. Cold only coming on when temp wheel is rotated all the >> way to max cool. >> >> Current readings are at Mono valve are as follows: >> 12 volts when system is off. >> >> System on any of the 3 center buttons pushed: >> 12 volts when temp wheel is set to full cool or full heat. zero volts when >> temp dial is moved to any other position. >> >> Zero volts when defrost button is pushed. >> >> Is this correct? Any suggestions? >> >> I have replaced mono valve already. >> Thanks, >> Mike >> Michael E. Esh >> >> >> _______________________________________ >> http://www.okiebenz.com >> For new and used parts go to www.okiebenz.com >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
