[dean68uk]

Hi All I am having trouble clearing the fault codes from my HEVAC. I have a BBS Fault Code Reader , but I still have the same codes logged even after repairs. I have six codes in total. Same codes over and over. Always reads six faults. Any ideas or anyone had a similar issue?

 

[RRToadHall]

I guess we should start with which codes they are. Chances are if they are cleared adn come back then they are real codes and you have some repairs to make.

 

[leftlanetruckin]

The HVAC goes through a self test every time it starts up. Thus if you fix a problem and restart it, the book symbol would not be there. If it still has the book symbol, you still have issues. Get the codes if possible, then fix the issues. You wont need any reset on the ECM, it will clear itself.
Martin

 

[viperover]

Switch cleaner is a good starting point, done this to mine and solved a few issues.
USE SWITCH Cleaner not WD40 or other type lube cleaners as they can insulate and cause more problems.

Areas where to apply swtich cleaner is ALL plugs to Hevac unit, work plugs a few times...

What problems/faults you having?

 

[RRToadHall]

You wont need any reset on the ECM, it will clear itself.

Not necessarily true. The HVAC ECU logs all faults until cleared. A fault may not trigger a full cheque book error, but it will be ogged. THe first time I hooked up to a code reader I had logged two+ pages of faults from long before I owned the rig clear back to a very early service when a faulty blend motor was replaced in 1999. The only time my personal rig has ever shown a cheque book is when the fuse box was failing and the relays were loosing contact. However, each time a fault was logged and could only eventually be fully cleared from the ECU via testbook.

 

[leftlanetruckin]

The HVAC goes through a self test every time it starts up. Thus if you fix a problem and restart it, the book symbol would not be there.

This is the point I was making Carl....If the check book is there, it still has issues and something is wrong. If it is not there, everything is fine. Stored codes didnt come into the equation on my end mate.
Obviously, as I already suggested, a reading of the codes is in order to allow him to fix the correct part.
Now if the EAS did the same thing after a hard fault, life would be good wouldnt it?
Martin