Rear blower

[Mike.Way]

Hope this gets a better(any) response than my last query.

We have a '98 Marquis/C12 with side radiator.  Beaver also installed an electric rear fan, I assume to pull hot air from the engine compartment.  I works during idle and after shutdown.  It may also work during travel.

Mine has failed.

Does anyone know the specs on this fan?  Will any nominal replacement work?  Perhaps the average NAPA or speed shoo add-on?

Thanks,
Mike

[barbhalsell]

If you do not get a response the first time you post, do it again. The newer queries will bump yours down the list. You just need the right person to see your question. Sorry, I definitely have no tech experience.

[Edward Buker]

Mike,

Seeing these fans serve no direct engine function just comfort cooling for the coach any after market fans that have similar blade configuration should work. It is a mystery to me how these fans are triggered given I do not have a schematic that shows them.  I'm sure it is some heat sensor or heat sensor and timer. The issue is not drawing too much of a load for the electrical components that are involved.  If this is relay fired with a fuse or breaker try and stay within the 50% range of the breaker and or relay current rating for the total fan load and you should be fine. If you have one fan operating you should be able to get a current meter in series with it and that would be a good current value to shoot for in a new fan. After that it is just mounting convenience.

To date mine have never come on and I was going to put in a manual switch for my own use as needed......but that is another project yet to be done.

Later Ed

[Jim Nichols]

If you replace with a aftermarket fan make sure it pulls not push the air from the engine compartment. Try to get a high cfm (cubic feet per min.).

[LarryNCarolynShirk]

When Beaver Coach Sales installed the rear fan in my coach, they wired it directly to the ignition power.  When the ignition is on, the fan is on.  There is no temperature sensor involved.

Larry

[Jim Nichols]

I installed a thermostatic switch from Napa Auto Parts (about $45). I put the thermostat bulb to the top corner of the radiator. I also installed a 30 amp self resetting breaker from the chassis batteries to a relay between the switch and the fan.

[Gerald Farris]

Mike,
Any fan that fits your mounting brackets, and has a similar amperage draw will work. A few fans are rotation sensitive and if so you need the right rotation, however most fans only need the wires reversed to achieve the right rotation.

This fan was installed to help purge the hot air from the engine compartment and is only for the purpose of preventing excess engine heat in the bedroom. The fan is set to come on at start-up and run until 30 minutes after shutdown. Beaver quit using this fan shortly after beds were moved to slides and engine compartment insulation became easier and more effective. The inoperative fan will only cause a little increased temperature is you bedroom, but it will have no effect on engine operating temperature.

Gerald

[Mike.Way]

Thanks all, for the quick responses.  One more item off the list.

Mike