[Archived]

My Vantre may be different since I have XLII, not H3. However I do have the fans in the same compartment. There is a rheostat up on the ceiling of the bay. This is hard to see since it is behind a partial partition in the ceiling. The settings allow for the fans to always be off, always on, and anything in between depending on the temperature. If this rheostat goes bad the fans always run by default. This could be your problem, if same setup.

[Walter]

Kim,

I found a “snap Disc” thermostat imbedded in the ceiling last night, with no adjustment that controlled 2 of the fans. The other fan seems to be wired in with the outside Fridge somehow. I’ll check that out tonight.

Mine doesn’t seem to be adjustable. I ordered a Digital thermostat as Tom suggested on another post.

Does anyone know what I should set the Digital thermostat at Temperature wise for the fans to come on?

[Jerry]

Just curious about how you know the snap disc is not working properly, and why you would trust information about the correct temperature settings from anyone but the converter?

If I have a fan whose purpose is to protect electrical devices by keeping them cool, there is no way I want to insert something to control the fan that will not fail “closed” so the fan runs continuosly.

[Dan]

Jon,

The fans run continuously no matter what the temperature is, I know they should not be running in 50 degree weather. They have always cut off in the past when the bus is not in use. Now, they run all the time inside my shop with nothing on, and with the bay door open?

I checked current across the Snap disc thermostat, and it was providing power to the fans.

I can certainly check with Featherlite, Just thought somebody on here may know.

[Archived]

I understood why you were asking, and presumed the snap disc was a NC switch that failed to open. My concerns are we can give you opinions, but to protect your very expensive electrical components we should not be offended if the information comes from the converter.

FWIW most Thermodiscs (brand name of a lot of snap discs) have the operating temp on the device.

[Brian]

Our vintage has just one of these fans in bay 2L (electrical bay). It runs 24/7/52 and doesn’t mind. During my ownership, one finally quite. Bought three more (spares) at about twelve dollars each. The point is, if they run all the time it is probably ok. But I understand if your accustomed to them shutting off and now they don’t.

[victor]

I agree with Jon. I am glad that if my thermostat fails, the fans run all of the time. This is good protection for the electronics in that bay. Featherlite told me when I purchased the coach (used) that the setting should be around 80 degrees for the fans to turn on. That is where i have left the setting. I have had to replace fans, but thermostat continues to function. I check the thermostat every 3-4 months for functioning.

[Archived]

The reason your fans run 24/7 in a Liberty is because they’re hard wired to the inverters and the only way to shut them off is to turn off the inverters. I think that’s nuts, but we’ve been down this road before, I like thermostats…

[victor]

Sounds like 80-85 degrees is the number. I agree, I definitely want them to run all the time IF the thermostat fails. But, I want the thermostat to work as designed. Like Tom, I like thermostats (when they are working).

It says CA 85 on it, which Selco says it closes at 85 Degrees + or – 7 degrees. and opens at 67.

I will go for a replacement and see what happens.

The fans only use .52 amps each, so not a big deal, if they never cut off I guess.

I’m probably to picky………that’s why I have a Prevost

[Dan]

Tom and I disagree on the thermostat issue. But we are both right.

By keeping his fan running only when needed Tom is protecting his coach. It does not have to operate when the ambient temperature in the bay is low.

But as was previously stated the fan is a very low current draw so there is a minimal downside to continuous operation. I think Liberty is alone in setting the coach up for continuous fan operation and I amn presuming their position is they don’t want to risk fan failure as a result of a faulty thermostat.

I am clearly from the school of thought that says we can improve everything and I don’t hesitate to modify my coach if I think of a better way of doing things. However before I make a change I try to evaluate the risk versus reward, and my view of the fan operation is that unless I can be assured of the failure mode of a thermostat resulting in a closed circuit I don’t want to accept the risk because the reward is so small, if any.

As long as owners of coaches with thermostatic control of electric bay fans monitor their operation there is no harm in controlling their operation. But the risk of a failure to operate could be damage to an inverter so it is very important to always monitor the operation, perhaps with a parallel circuit with a warning light on the dash.

[Rodney]

I would be very concerned if my inverters were in the same bay, but the only items in there are the 12v breaker cabinet, the 110v breaker cabinet, and the fiber optic light box (which has it’s own fan), and the central panel switches control box (which has it’s own 2 fans). On the other side is the outside Fridge.

The inverters are in bay 3.

I’m going to just let them run…..like Liberty does.

[joel]

The fact the device has a fan sends a strong message that it is heat sensitive. It is relying on fresh cool air the compartment fan delivers for cooling. Sounds like Vantare did a good job considering how to protect your investment.

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1999 XLV X-6872,  liberty #440

[Ronald]

Back in 2005 when we owned our 2000 Marathon H3-45, we had some of its graphics changed. As we prepared to leave the bus at the paint shop in Fontana, CA we called Marathon asking procedure to hibernate coach

Follwed instructions to the “T”. Once finished, we thought bus was dead still and left it

Two weeks later, returning to the bus excited to wake it up, we found the “house battery side” to be deader than a door nail. Just couldn’t understand after shutting the house side down, it was still dead

cut the short, these fans were hard wired directly to the house batteries. For the future, we learned both house and chassis have hard wired items with parasitic drains.