A/C/Blower Fuse keeps blowing
09-09-2007, 12:32 AM
#1
Newbie
Thread Starter
A/C/Blower Fuse keeps blowing
Just started today, the #1 fuse (16A-Red) keeps blowing. But the funny thing is, the fuse will only blow if I have A/C & blower fan ON at the same time. With BOTH ON, the fuse will blow in about 20 seconds.
If only A/C ON (blower NOT ON), the fuse does not blow.
If only Blower ON (A/C NOT ON), again the fuse does not blow.
Any ideas to what I should check would be GREAT! TIA.
If only A/C ON (blower NOT ON), the fuse does not blow.
If only Blower ON (A/C NOT ON), again the fuse does not blow.
Any ideas to what I should check would be GREAT! TIA.
09-09-2007, 02:12 AM
#2
Newbie
Thread Starter
Could this be my problem?
I found this by post "SRDiver". Could this be my problem? Time to replace my Blower?
10-05-2004, 05:50 AM #2
SRDiver
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Join Date: Sep 2004
Location: Edmonton, Ab, Canada
Vehicle I drive: 84 190E
Posts: 58
simple - stupid
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for the price of two fuses the problem was solved - turns out the route cause was a blown fuse. And the trouble all started when I replaced the fuse with a "bad" one. After many hours with a gauge and a few parts later all it took was a second fuse. However the blower matter may still require replacing. It seems as the brushes wear down it draws more amps and poof the fuse goes. Because the AC/Heat system is interconnected it will rob from one to try to make the other work, thus the buzzing relay and the Aux fan coming on.
10-05-2004, 05:50 AM #2
SRDiver
Almost a Member!
Join Date: Sep 2004
Location: Edmonton, Ab, Canada
Vehicle I drive: 84 190E
Posts: 58
simple - stupid
--------------------------------------------------------------------------
for the price of two fuses the problem was solved - turns out the route cause was a blown fuse. And the trouble all started when I replaced the fuse with a "bad" one. After many hours with a gauge and a few parts later all it took was a second fuse. However the blower matter may still require replacing. It seems as the brushes wear down it draws more amps and poof the fuse goes. Because the AC/Heat system is interconnected it will rob from one to try to make the other work, thus the buzzing relay and the Aux fan coming on.
09-09-2007, 06:42 PM
#3
Newbie
Thread Starter
May help someone out.....
OK, spoke to my Mechanic Uncle. He was surprised that it is only a 16A fuse with ALL that connected to it. He thinks the 16A fuse is just on the border & with parts getting old it will draw a bit more current, therefore end result blown fuse. He saids even when you recharge the A/C with a bit too much freon, under pressure will draw a bit more current too.
He gave me a "20A resettable fuse" to replace the 16A fuse. Problem SOLVED!
OK, spoke to my Mechanic Uncle. He was surprised that it is only a 16A fuse with ALL that connected to it. He thinks the 16A fuse is just on the border & with parts getting old it will draw a bit more current, therefore end result blown fuse. He saids even when you recharge the A/C with a bit too much freon, under pressure will draw a bit more current too.
He gave me a "20A resettable fuse" to replace the 16A fuse. Problem SOLVED!
09-09-2007, 08:23 PM
#4
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Join Date: Jul 2007
Location: NJ, USA
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2004 E500 4matic
May help someone out.....
OK, spoke to my Mechanic Uncle. He was surprised that it is only a 16A fuse with ALL that connected to it. He thinks the 16A fuse is just on the border & with parts getting old it will draw a bit more current, therefore end result blown fuse. He saids even when you recharge the A/C with a bit too much freon, under pressure will draw a bit more current too.
He gave me a "20A resettable fuse" to replace the 16A fuse. Problem SOLVED!
OK, spoke to my Mechanic Uncle. He was surprised that it is only a 16A fuse with ALL that connected to it. He thinks the 16A fuse is just on the border & with parts getting old it will draw a bit more current, therefore end result blown fuse. He saids even when you recharge the A/C with a bit too much freon, under pressure will draw a bit more current too.
He gave me a "20A resettable fuse" to replace the 16A fuse. Problem SOLVED!
09-11-2007, 03:17 AM
#5
Newbie
Thread Starter
Update
OK, A/C failed again, compressor does NOT come on at all..period. Followed service manual's trouble shooting guide. Finally found the part, it was the A/C relay. I guess it finally failed completely.
