Took cover off of my roadster after the winter today, battery had been on ctec maintenance charge.

Car started 1st time but heater fan wasn’t working. Turned engine off. Checked every single fuse and all good. Restarted engine and soon after spoiler came up, light on spoiler switch was flashing but couldn’t lower spoiler. Turned engine off and put code reader on. No codes. Restarted, heater blower came on full blast and stayed on full despite turning the dial to lower fan speed and fan wouldn’t turn off neither. Then had a number of warning lights come up including ABS. Used code reader again and no codes. Restarted a few times and warning lights disappeared and I was able to lower spoiler. Switched off engine, removed key and found that heater blower continued to run. Only managed to stop it by disconnecting battery.

Has anyone ever had a similar experience or have any ideas to help me??

 

How old is your battery? I know you mentioned you had the battery on a "maintenance charge" ... have you had the battery Load Tested? It may look good with a meter but fail a Load Test. The spoiler acting up a a good sign the battery is a big part of your problem. The electronics on these cars are very sensitive, a new battery could fix all your problems.

 

Replace battery. If the fan still blows, replace the "blower motor resistor".
This is not an uncommon occurrence when taking a car out of storage that has been on a "battery maintainer"*





*I would never connect one of those to anything I own. And if I did, I'd disconnect the battery from the car/motorcycle so that it can only overcharge the battery, not damage the electronics of the car.