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11-04-2020, 11:11 AM
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#1
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Senior Member
Workhorse Chassis Owner
Join Date: Apr 2005
Location: Spanish Springs, NV, USA
Posts: 299
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Aux. Cooling Fans Inop
2006 W22 8.1. 140,000 miles.
We had a 6 year old heater hose blow while underway. Able to cut and reclamp to get on the way. 100 miles later the water pump started seeping. Replaced the pump and associated hoses.
Now, the coolings fans will not come on.... I switched out the relays and they're good and checked fuse with Ohmeter. . .We were able to get home by running a lead to one fan and keeping it on.
One fan is original and the other is 4 years old.
Is there a sensor somewhere that I am missing?
__________________
2006 Dolphin LX 6320 W22 34 FT.
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11-04-2020, 11:45 AM
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#2
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Senior Member
Workhorse Chassis Owner
Join Date: Sep 2017
Posts: 2,158
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I think the electric fans only operate when the air conditioner is turned on and when the engine is getting hot. You might try turning on the AC to see if that turns on the fans.
__________________
2003 34' Georgetown on W20 Workhorse Chassis. UltraRV power mods. Doug Thorley Headers and MagnaFlow 12589 mufflers. Front Sumo Springs, Rear P32 Sumo Springs, UltraRV Track Bar.
1998 Jeep Toad.
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11-04-2020, 12:17 PM
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#3
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Senior Member
Workhorse Chassis Owner
Join Date: Apr 2005
Location: Spanish Springs, NV, USA
Posts: 299
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Cooling Fans
They do not come on with AC on either.
__________________
2006 Dolphin LX 6320 W22 34 FT.
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11-04-2020, 05:58 PM
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#4
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Senior Member
Join Date: Nov 2018
Location: Fulda, MN
Posts: 1,254
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They will most likely not run when you initially turn on the ac. The high pressure switch tells them when to turn on and it depends on the ambient temp as to how long that would take depending where you are.
__________________
2000 Winnebago Adventurer 32v, P32 Workhorse
2005 Winnebago Adventurer 38J W24 Workhorse 8.1l, 5 Speed Allison MH2000
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11-04-2020, 06:22 PM
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#5
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Senior Member
Workhorse Chassis Owner
Join Date: Apr 2005
Location: Spanish Springs, NV, USA
Posts: 299
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Where is this high pressure switch on the 8.1?
__________________
2006 Dolphin LX 6320 W22 34 FT.
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11-04-2020, 07:12 PM
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#6
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Senior Member
Join Date: Nov 2018
Location: Fulda, MN
Posts: 1,254
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It is in the high pressure line, most likely next to the cab AC box. It will have two wires goin to it. It will be on the smaller of the two lines. The low pressure switch will be in the same area.
__________________
2000 Winnebago Adventurer 32v, P32 Workhorse
2005 Winnebago Adventurer 38J W24 Workhorse 8.1l, 5 Speed Allison MH2000
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11-05-2020, 08:07 AM
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#7
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Senior Member
Workhorse Chassis Owner
Join Date: Sep 2017
Posts: 2,158
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Quote:
Originally Posted by David 70
They will most likely not run when you initially turn on the ac. The high pressure switch tells them when to turn on and it depends on the ambient temp as to how long that would take depending where you are.
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It may never turn on if the AC charge is low. Too little refrigerant will not create enough pressure to activate it.
__________________
2003 34' Georgetown on W20 Workhorse Chassis. UltraRV power mods. Doug Thorley Headers and MagnaFlow 12589 mufflers. Front Sumo Springs, Rear P32 Sumo Springs, UltraRV Track Bar.
1998 Jeep Toad.
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