I have a weird issue. My blower motors have stopped blowing. On startup they blow for a few seconds and then abruptly cut off and I get the good old Testbook Symbol on the HVAC controller. Sadly I don’t have Nanacom or similar.
Adding to the weirdness is that one out of every 50 or so starts the blower motors keep blowing and act as if there is no issue at all! When I turn the car off and on they go back to not working.
Some things I've already tested:
Relays- swapped them out for new ones with no change.
Fuse box - brand new just replaced
Alternator - Just replaced and making a prefect 14 volts.
Battery - Also fairly new and likely not the cause.
Other factors - I have my left blower motor disconnected. It's burned up my original fuse box (as is so common #britishwiring) and even after replacing the fuse box and motor, it was still pulling far too many amps. I suspect damage to the power wire is causing far greater resistance than is normal. I will be replacing it soon. However I have run the system with only one motor in the past. So, I don’t think this is an issue.
Thanks in advance!
Adding to the weirdness is that one out of every 50 or so starts the blower motors keep blowing and act as if there is no issue at all! When I turn the car off and on they go back to not working.
Some things I've already tested:
Relays- swapped them out for new ones with no change.
Fuse box - brand new just replaced
Alternator - Just replaced and making a prefect 14 volts.
Battery - Also fairly new and likely not the cause.
Other factors - I have my left blower motor disconnected. It's burned up my original fuse box (as is so common #britishwiring) and even after replacing the fuse box and motor, it was still pulling far too many amps. I suspect damage to the power wire is causing far greater resistance than is normal. I will be replacing it soon. However I have run the system with only one motor in the past. So, I don’t think this is an issue.
Thanks in advance!