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Topic: What's this? (blower found in bay) (Read 934 times) previous topic - next topic

Re: What's this? (blower found in bay)

Reply #25 –
Quote from: craneman –
If it is set on 40 it is trying to get the bay to 40 which would be making the fan run. When set on 85 it turns off as that is probably the temp in the bay. Same as turning air conditioning thermostat to 60 and air comes on until it reaches the setting.
While that may seem the logical way it works, FOT did not set up this way. When set for 80 degrees, it should come on when the temp reaches that number. This is an item only found on newer coaches and may seem strange to owners of older models
Bob
Bob & Kathy
2007 Nimbus
Full Timers
Retired Charter Bus Owner/Operator

Re: What's this? (blower found in bay)

Reply #26 –
I have one FT put in on my 01.  I do not think it is only newer coached though my thermostat s a bit different.
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: What's this? (blower found in bay)

Reply #27 –
There is one of these in my 2001 U320 in the main storage bay.  The inverter is in that bay and the AquaHot is next to it and vents heat into that bay.  Excess heat goes into the bay where my fresh and waste tanks are.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: What's this? (blower found in bay)

Reply #28 –
 Okay this is what is happening with the fan. With the thermostat is set at a lower temp the fan cuts on. When set at a higher temp such as 85 - 90 the fan cuts off. When on, it seems  the fan is pulling air out of the compartment exhausting it out of the coach through the silver hose connected to the fan. I have never seen anything like it, so it raised my curiosity as to what this could be.
Wife Sue. Pets rescue: Suzie, Hobo, Peaches and Izzie the cat.
Rainbow bridge; Bart, Levi, Charlie, Old Fella, Mama
2007 Nimbus 336 Foretravel motor home

Re: What's this? (blower found in bay)

Reply #29 –
Works like an air conditioner, a heat exhaust fan.

Roland
1993 U280 4341
2010 Jeep Liberty
The Pied Pipers

Re: What's this? (blower found in bay)

Reply #30 –
Quote from: dixie flyer –
Okay this is what is happening with the fan. With the thermostat is set at a lower temp the fan cuts on. When set at a higher temp such as 85 - 90 the fan cuts off. When on, it seems  the fan is pulling air out of the compartment exhausting it out of the coach through the silver hose connected to the fan. I have never seen anything like it, so it raised my curiosity as to what this could be.
It is definitely an exhaust fan. Apparently, it is wired in reverse. It should kick on when the temp reaches the set temp. Alton at FOT had to fix mine for the same reason you are having. He said that many were wired wrong. I took him all of three minutes to fix it. I does a great job exhausting hot air out of the compartment. Might need to get that fixed so it works correctly. Regardless of what others are saying, as an owner of the same model, two builds apart, your coach and my coach where on the production floor at the same time. That I know from FOT. So, it stands to reason we will experience similar problems for sure.
Bob
Bob & Kathy
2007 Nimbus
Full Timers
Retired Charter Bus Owner/Operator

Re: What's this? (blower found in bay)

Reply #31 –
Quote from: prfleming –
These thermostats are brain-teasers. To state Bob's explanation another way, when you turn "down" a cooling thermostat, it will turn on to attempt to reach the colder temperature requested. This is what Dixie Flyer said was happening. In summer temperatures the 40 degrees will never be reached without some type of additional cooling, so the fan would run continuously.

When you turn "up" a cooling thermostat, it will turn off when the temperature matches the ambient temperature (85 degrees in this case) - because cooling is no longer being requested. Again as Dixie Flyer stated was happening. When set at 85 degrees and fan off, if the temperature would rise above 85 degrees, the fan would turn on, as stated by Bob, to try to reduce the temperature back to 85 degrees, and then shut off again.

This is the way the kitchen Fantastic vent thermostat works, this is also a "cooling" thermostat.

Correct......... a cooling thermostat..... the fan can only cool the compartment to the ambient temp outside at best, if set too low it will run continuously without some type of cooling added.  80 to 85 should be fine


Justin & Cathy Byrd
1995 U280 "Old Faithful"
36' Build #4673
C8.3 Cummins
Allison MD3060R 6 speed - retarder
Powertech 10KW  4cyl Kubota

Re: What's this? (blower found in bay)

Reply #32 –

This exhaust fan looks like a great idea! I added an inverter/charger in my center storage bay and it produces a lot of heat when charging and inverting. I have been leaving the bay door slightly open when camping, adding a blower will help.

I found the same thermostat that you guys have here - only $25:

Exhaust fan thermostat

Here is a blower that should work - only $28. Easy project for next weekend!

Exhaust fan

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Peter and Tammy Fleming
1991 U300 GV 40 - Sold, owned for 4 years
Downsized to Roadtrek Popular 210 class B

Re: What's this? (blower found in bay)

Reply #33 –
I have thought about doing this also, the bay gets quite warm, mostly because the duct work for the generator radiator runs through the front corner driver side of the bay down to the underneath of the coach.

FT designed it this way so maybe its not really an issue?



Justin & Cathy Byrd
1995 U280 "Old Faithful"
36' Build #4673
C8.3 Cummins
Allison MD3060R 6 speed - retarder
Powertech 10KW  4cyl Kubota

Re: What's this? (blower found in bay)

Reply #34 –
Peter found what looks like the identical thermostat. The specs say it's a SPDT (single pole double throw) thermostat, that means it could be wired for either heating or cooling. It would be very easy to connect it incorrectly for a given application.

If the fan comes on with ambient temperature rise, then it is wired to cool.
Bob & Suzy
2000 U320 4010 SPEC
2006 Honda CRV

Re: What's this? (blower found in bay)

Reply #35 –
I have it, and it vents to the outside thru the bottom of inverter compartment.
'07 Phenix Double slide, Bunk beds, 42'
'14 Wrangler Unlimited Rubicon

Re: What's this? (blower found in bay)

Reply #36 –
Our 2005 has what I call a button thermostat mounted on the ceiling in the inverter/charger bay.  A single switch electrical box was used with a solid plate cover with a whole drilled out for the thermostat to fit in.  Works great and pretty simple which I like.

Electrical box is mounted to the ceiling.
Gary Mauck
Deerfield Beach, Fl.
2005 U320 40' PBGB

"Elks Care, Elks Share!"

Re: What's this? (blower found in bay)

Reply #37 –
That's what our '03 has.
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: What's this? (blower found in bay)

Reply #38 –
That is what my 2003 has.  When the temperature is above the set point, the fan is on.

Tom Lang K6PG (originally  KC6UEC)
and Diane Lang
2003 38 U295 build 6209
2016 Jeep Grand Cherokee Summit Ecodiesel
still have tow-ready 2006 Acura MDX 
Temple City, California
Motorcade 16681 California Chapter President
SKP 16663 member of SKP Park of the Sierra, Coarsegold California
FMCA F071251
Retired electrical and electronic engineer