Air conditioning experiences

[Holeshot]

I’ve been sorting all the electrics out for the AC and got everything running fine although the compressor clutch is seized but I’m getting that rebuilt.

However now, the AC fuse keeps popping after about 5 seconds when I switch the AC on.
To find the culprit by the process of elimination, I’ve individually disconnected the compressor, blower and fans.
The fuse only pops when the blower fan is connected.
The resistor is basically new and the wires connected to it are in the right place as are the ones on the switch.

I did note that when the blower fan was connected before, the resistor was getting surprisingly hot but with just the cooling fans running it didn’t.
I can’t understand why a puny little fan would generate so much heat?
Should I assume it’s the relay that’s the cause and popping the fuse?

[bitsobrits]

Fuses open when the current exceeds the fuse rating. I believe the relay coil circuit is on a different fuse than the power circuit through the relay contacts, so the relay would not be causing the issue you are seeing. The issue is your fan/resister is drawing too much current, or your fuse is undersized. Make sure you have the correct fuse rating installed, and that the fan power circuit is attached to the correct fuse circuit. Electric motors can draw several times their normal current during start up, which only lasts a few seconds. So perhaps too much mechanical drag (bearings? does the fan spin freely with no power?) or the resistor is the wrong value. Has the resistor been replaced with an aftermarket unit?

[Holeshot]

Many thanks bitsobrits.

I’ve always suspected the motor might have been a bit duff.
I dropped it out of the evaporator housing and wired it up to the battery direct with a switch and fuse. And yes, the fuse popped within 3 seconds.

I’m sending it off to be repaired so will see what they say.

Slowly getting there…….

Cheers, Hilton

[Holeshot]

I sent the blower motor off the Robson & Francis Rewinds in South London and it came back within 3 days!
I'd recommend these guys for their unbelievable customer service. They rebuild almost any electric motor!

Wired it up and couldn't believe; nothing happened.

Tracked it down to the relay - turned out it *had* gone pop - so thinking the old, duff motor had probably done blown that too.

So, one nice shiney new relay later and 'presto!!'..........the power from the fan is incredible!

I'm so pleased I've resolved the puny waft of air that it used to give out.

The original compressor is being rebuilt and due any day now so only a few steps away from the big day when Mr. Mobile AC visits me and we try to get the system working again.

[Holeshot]

I’ve now found that there’s a split in condenser where the copper tube meets the body. Probably where someone has previously twisted the tube whilst undoing/tightening the joint.

My question:

Can condensers be repaired?
It’s such a simple repair if was a normal radiator, but I’ve a feeling this will be filed under ‘specialist service’ and cost a small fortune.

I’d really not have to replace it as it will be expensive and probably won’t fit.

Can anyone help or got any suggestions??

Thanks guys.