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06-14-2025, 08:17 PM
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#1
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Member
Join Date: Aug 2019
Posts: 58
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dash HVAC blower inop
We have what apparently is the standard Evans Tempcon unit. We have been having a couple of issues with it which I will troubleshoot if can get the blower working. When it first failed I checked the 20A fuse in the panel under the driver's seat and it had blown. I replaced it, and the replacement blew. I checked the voltage between the two fuse terminals and it was 12+ VDC. I think that means a dead short to ground somewhere in the system?
Possibly related, we recently had a rodent in the coach. I'm afraid it is possible it caused the short somewhere. I have the control panel out of the dash and can check the four wires going to the fan switch, but don't know what I am looking forward. Any ideas?
Thanks!
__________________
Jim
2002 Monaco Knight
Payzon, AZ
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06-14-2025, 09:56 PM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 35,663
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Have you had the blower motor out ?
Can't overlock the possibility that there is something jamming up the motor and blowing the fuse.
Nest , carcass ...
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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06-15-2025, 08:19 AM
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#3
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Member
Join Date: Aug 2019
Posts: 58
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Quote:
Originally Posted by Skip426
Have you had the blower motor out ?
Can't overlock the possibility that there is something jamming up the motor and blowing the fuse.
Nest , carcass ...
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Certainly a possibility, but I am trying to check the easier things first.
And thanks for the attachments; very useful!
__________________
Jim
2002 Monaco Knight
Payzon, AZ
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06-15-2025, 06:55 PM
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#4
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Member
Join Date: Aug 2019
Posts: 58
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Quote:
Originally Posted by Skip426
Have you had the blower motor out ?
Can't overlock the possibility that there is something jamming up the motor and blowing the fuse.
Nest , carcass ...
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If it turns out to be the blower, I don't know where it is or how to get to it. I assume it is aft of the firewall, but I know of no way to access that area. Any thoughts?
Thanks!
__________________
Jim
2002 Monaco Knight
Payzon, AZ
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06-15-2025, 09:06 PM
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#5
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 35,663
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Many coach manufacturers didn't design the dash with servicing in mind . 
Luckily Newmar gave access and when required I can have my blower motor out in under 10 mins .
Picture is taken looking up from the stepwell , wiring is to the speed resister block , motor is across the bottom of the photo. .
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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06-15-2025, 09:10 PM
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#6
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Member
Join Date: Aug 2019
Posts: 58
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Quote:
Originally Posted by Skip426
Many coach manufacturers didn't design the dash with servicing in mind .
Luckily Newmar gave access and when required I can have my blower motor out in under 10 mins .
Picture is taken looking up from the stepwell , wiring is to the speed resister block , motor is across the bottom of the photo. . |
I wish. I looked up from the stepwell and everything is sealed off.
__________________
Jim
2002 Monaco Knight
Payzon, AZ
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06-15-2025, 09:21 PM
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#7
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 35,663
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Removable panel ?
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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06-15-2025, 09:23 PM
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#8
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Member
Join Date: Aug 2019
Posts: 58
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Quote:
Originally Posted by Skip426
Removable panel ?
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Didn't look like it at first glance, but I will certainly try.
Thanks for the tip.
__________________
Jim
2002 Monaco Knight
Payzon, AZ
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