Discussion
Its a common problem having the HVAC ECU fail on F355's and mine's no exception.
Sadly new ones NLA and used ones like rocking horse sh*t.
There's a thread on Ferrari Chat confirming that its usually just one of the 6 chips that has failed and these are available for about £5 each.
Whilst I could send mine off to ASI in US/Canada who many US owners have used, I'd prefer to get one of the UK ECU repair/test companies to do the work but would feel way more comfortable using someone tried/tested and recommended.
Has anyone had their F355 HVAC ECU repaired in the UK, or need to get theirs repaired if I can find someone?
Sadly new ones NLA and used ones like rocking horse sh*t.
There's a thread on Ferrari Chat confirming that its usually just one of the 6 chips that has failed and these are available for about £5 each.
Whilst I could send mine off to ASI in US/Canada who many US owners have used, I'd prefer to get one of the UK ECU repair/test companies to do the work but would feel way more comfortable using someone tried/tested and recommended.
Has anyone had their F355 HVAC ECU repaired in the UK, or need to get theirs repaired if I can find someone?
100 IAN said:
Its a common problem having the HVAC ECU fail on F355's and mine's no exception.
Sadly new ones NLA and used ones like rocking horse sh*t.
There's a thread on Ferrari Chat confirming that its usually just one of the 6 chips that has failed and these are available for about £5 each.
Whilst I could send mine off to ASI in US/Canada who many US owners have used, I'd prefer to get one of the UK ECU repair/test companies to do the work but would feel way more comfortable using someone tried/tested and recommended.
Has anyone had their F355 HVAC ECU repaired in the UK, or need to get theirs repaired if I can find someone?
I'd think any of the UK based ECU repair companies would be able to repair that - problem being that it is very rare for chips to 'fail' without reason.Sadly new ones NLA and used ones like rocking horse sh*t.
There's a thread on Ferrari Chat confirming that its usually just one of the 6 chips that has failed and these are available for about £5 each.
Whilst I could send mine off to ASI in US/Canada who many US owners have used, I'd prefer to get one of the UK ECU repair/test companies to do the work but would feel way more comfortable using someone tried/tested and recommended.
Has anyone had their F355 HVAC ECU repaired in the UK, or need to get theirs repaired if I can find someone?
Porsche use the same chip in the same application and failures there can be traced to faults within the rest of the system - lack of refrigerant or intermiitant
connections within the flap position servos.
see here https://www.bergvillfx.com/porschehvac2 and here https://www.bergvillfx.com/index.php/ccurepair
Ian - I'm sure you've done your research, but feel it's worth posting my experience. I removed my HVAC ECU due to inability to set air direction, which is one of the symptoms in the Ferrarichat thread you mentioned. I'm handy with a multimeter and soldering iron and was going to fix it myself. I traced every connection on the board and measured resistances at each chip, but couldn't find anything wrong. After refitting the ECU, it magically started working correctly.
So - try unplugging the ECU (not just turning off the battery) and leaving it unplugged for a while to ensure there's absolutely no charge left in the circuit, then plug it back in. It might save you a repair bill.
So - try unplugging the ECU (not just turning off the battery) and leaving it unplugged for a while to ensure there's absolutely no charge left in the circuit, then plug it back in. It might save you a repair bill.
Edited by HardtopManual on Saturday 18th February 23:19
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