Fuse location on engine a/c compressor

Ohm/voltage check across the fuse depending on if you have power on them. Also if you have low freon then you will not have power to the clutch. Sorry can't help you on location.

I would check to make sure it is not low on refrigerant. Most common cause.

Krusty wrote:
I would check to make sure it is not low on refrigerant. Most common cause.

This is the cause 99% of the time--- Low refrigerant Doug

Thanks for the replies. I did have an a/c shop check freon level and they said it was good. Still hoping someone has a suggestion as to where the fuse might be that I may have overlooked.

Apples to oranges, but the fuse for our '14 American Revolution is in an inline holder, buried under the dash, near the evaporator assembly. Not an easy find, even after being told where to look....

hotjag1 wrote:
Thanks for the replies. I did have an a/c shop check freon level and they said it was good. Still hoping someone has a suggestion as to where the fuse might be that I may have overlooked.

HOW could they possibly check the 134a level(volume) with NO COMPRESSOR RUNNING?
IMPOSSIBLE. So, don't ever use that shop. Doug

dougrainer wrote:

hotjag1 wrote:
Thanks for the replies. I did have an a/c shop check freon level and they said it was good. Still hoping someone has a suggestion as to where the fuse might be that I may have overlooked.

HOW could they possibly check the 134a level(volume) with NO COMPRESSOR RUNNING?
IMPOSSIBLE. So, don't ever use that shop. Doug

Without knowing exactly what the "a/c shop" did, I tend to agree with Doug.

If they put gauges on it, they might be able to determine that there is SOME refrigerant still in the system, above atmospheric pressure, but without the compressor running, you can't really tell much.

I believe they could've measured the continuity of the low pressure switch and tried to make a determination from that as well. But again, without the compressor turning, I don't think that's reliable.

Now, they possibly could have jumped the low pressure switch, bypassing it, to see if the compressor came to life. (NOTE: Only do this momentarily as this could damage the compressor if allowed to run without proper oil circulating through the compressor.) If it did, THAT would indicate a likely possible low-refrigerant level. But if it didn't, that would most likely indicate the problem is elsewhere. If it did cause the compressor to work, then they probably would've offered to charge it for you.

Do you know exactly what the "a/c shop" did in their diagnosis? You can try jumping the low-pressure switch to see if that cause the compressor to kick in.

Good Luck,

~Rick

Cincy Steve wrote:
Apples to oranges, but the fuse for our '14 American Revolution is in an inline holder, buried under the dash, near the evaporator assembly. Not an easy find, even after being told where to look....

There are several inline fuses under the dash. Rather than pay $165 an hour, I picked up the rv and told them I will continue to look for the a/c fuse. Thanks for the suggestion. I'll probably start checking all of them after the holiday.

Rick jay and Doug, thanks for the feedback about no compressor running.
This is a quote from the invoice.
"Checked A/C. Recovered system. Was about a pound low. Charged to 4.2 lbs. Test ran. Clutch is not engaging". I have no idea if they bypassed the low pressure switch.
Tiffins suggestion for fuse location was no help. I'm going to have to check every fuse that I can locate.

I am assuming the dash blower blows.

Might be the control switch.. Or might be the through wall if there is a connector at the firewall.. or a relay .. Some systems use a relay to power the compressor controlled by either a thermostat or the swich on the dash.

Only solution is to trace the wire.. Harbor Freight sells a great little cable tracker.