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Old 11-16-2014, 03:26 PM   #1
Robert Foster
 
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Default Airtronic Heater Controls Question

I am a new owner. I just purchased #246 a couple of weeks ago. I flew out to Portland, Oregon and drove it back to Virginia.

Almost everything on/in the rig works very well and I am very happy to once again be the owner of a Sprinter based RV. I owned a Winnebago View for 4 years. Aside from purchasing a new carbon monoxide alarm and removing the TV, I have yet to do any maintenance or personalization to my Westy.

I need education about the Airtronic heater. I've read every piece of literature that came with the rig but I can't figure out the control functionality/interface between the dial control mounted beside the sliding door and the main digital control mounted in the ceiling between the driving seats. Either they are malfunctioning in my rig or I have yet to figure out their proper function.

The heater in my rig puts out beautiful heat at both low and high elevation ... I found the elevation switch in the sliding door step well. What the heater doesn't do is maintain the rig at a set temperature. At night I would turn the heat on with the dial control, the interior would warm up nicely, the heater would spool down to a joyful quiet run and I'd drift off to a blissful sleep on the luxuriously comfortable upper berth. Sometime in the wee hours of the night I would wake up shivering to find the interior temperature down in the 40's. I had to turn off then turn on the dial control to wake up the Airtronic heater to get warm again. The main digital control seems to have no affect on the operation of the Airtronic in my rig.

Is there a manual or write up floating around the web to explain how the controls are supposed to function. I already searched around here. The small manual I have doesn't have anything about the dial control in it.

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Last edited by Robert Foster; 11-16-2014 at 03:35 PM.
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Old 11-16-2014, 06:06 PM   #2
onemanvan
 
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Default Re: Airtronic Heater Controls Question

Can you attach a picture of the dial control?
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Old 11-16-2014, 09:09 PM   #3
Robert Foster
 
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Default Re: Airtronic Heater Controls Question

Quote:
Originally Posted by onemanvan View Post
Can you attach a picture of the dial control?
Here's what I'm calling the dial control


Here's what I'm calling the main digital control
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Old 11-16-2014, 09:25 PM   #4
OldWest
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Default Re: Airtronic Heater Controls Question

Dial control is aftermarket. Prior owner must have bypassed central computer console heater control and replaced with dial control. (A Florida owner also bypassed central computer console and had installed an Espar Diagnostic Control Unit above the metal kitchen dishpan--handier location for upper bed).

Can't see any manufacturer name on dial control. Might check lubrication specialist.com to see different Espar control units.

The black thing halfway up rear sliding door pillar is the temp sensor for the central console.

The Espar heater factory wiring was cut and spliced with a different wiring connector to connect through the steel enclosure box. Greg at lubricationspecialist made a wiring harness to connect to our Westy modified Espar wiring harness. He also sells a diagnostic unit which can also be used as a control.

As someone already further modified your unit with a dial control, the wiring harness may have been modified even more. You can get more info by taking a picture of the connector coming out of the steel enclosure box (under vehicle, below the large awning window--exhaust pipe). .

OneManVan can provide more tech info.
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Old 11-16-2014, 09:43 PM   #5
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Default Re: Airtronic Heater Controls Question

Quote:
Originally Posted by OldWest View Post
Dial control is aftermarket. .................................................. .................................You can get more info by taking a picture of the connector coming out of the steel enclosure box (under vehicle, below the large awning window--exhaust pipe). .

OneManVan can provide more tech info.

Thank you for the help. Now that I know it's aftermarket I'll begin looking through the mountain of receipts that came with the vehicle to see if I can find any mention of the modification.

Here's a picture of the bottom of the Airtronic and the wiring cable coming out of it. I traced the cable for a few feet and didn't see any connector.

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Old 11-17-2014, 02:29 AM   #6
OldWest
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Default Re: Airtronic Heater Controls Question

The wiring goes through the top part of the driveshaft side of the steel enclosure box toward rear (close to the underside of the van floor) Rather than just a hole in the steel box, Westfalia made a connector there.

Your photo shows the bottom of steel box enclosure. You have a different setup there which may be original or not (as you have one of the last Westies). I have a corrugated tube in the shape of a U with a small pinhole which joins the other empty hole you have on bottom of steelbox versus your hose running out.

Your elevation two pump switch was also aftermarket addition which Westfalia should have done from the start.

Might be worthwhile for you to buy the diagnostic control unit from lubrication specialist. You can see if you can hook up to your Espar unit. If not, then see if you need to buy the Westy wiring harness adapter from lubrication specialist.

You can use the diagnostic control unit instead of your dial control.

Greg at lubricationspecialist also offers a flat fee repair/maintenance/clean service plus parts. He was the one who made the Westy wiring adapter--otherwise, can't hook up the Espar diagnostic units. There is an atomizer screen which is supposed to be replaced periodically.

.
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Old 11-17-2014, 02:37 AM   #7
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Default Re: Airtronic Heater Controls Question

In your photo, the one metal hose is exhaust (different than mine), the smaller hose is fuel line, and the third hose is presumably air intake for combustion chamber. That third hose is different on mine, which has both ends attached to bottom of steel enÁlosure box.

The steel enclosure box is held on by 6 or so bolts at the very top. Espar heater sits inside.

As your heated generally works fine, wonder if you dial control has a built-in timer or is designed to shut off when a certain temp is reached. Also, where is your temp sensor (the original central console one or in the dial control itself).
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Old 11-17-2014, 02:31 PM   #8
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Default Re: Airtronic Heater Controls Question

Robert,
I've found a description of the item your rig has apparently been modified with. I suggest you contact Greg for information on how to bypass the auto shutdown. Looks like it's a nice addition with the ability to read the error codes. I imagine this was an owner upgrade, and not the Westfalia/Airstream upgrade as i've not heard of any of the other Westy units having this feature. Will need to keep this in mind if our main controller ever fails.

http://www.lubricationspecialist.com.../diag-control/
Replace your broken mini controller with the new Airtronic Digi controller and diagnostic code reader. This is the latest for temperature control for all Airtronic air heaters. Digital read out for actual air temperature and setpoint. Also will read diagnostic fault codes. Has built in 10 hour shut down timer which can also be bypassed.

Greg Landuyt
Lubrication Specialist, LLC.
5231 Sugar Hills Dr
Greenfield, IN 46140
317-326-4296
Fax 775-201-1480
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Old 11-17-2014, 04:22 PM   #9
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Default Re: Airtronic Heater Controls Question

Looks like someone modified the routing of your left handed smoke bender hose as well.
It should be in a mobius loop configuration as in the attached image.
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Old 11-17-2014, 10:14 PM   #10
Robert Foster
 
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Default Re: Airtronic Heater Controls Question

Thank you for all the helpful information. I'll need to do some research to educate myself more about these systems, then do some sleuthing around and under my rig to see what I have before I can follow up with some intelligent questions to help me figure out my problem and fix it. I'll hopefully be able to do that in the next couple of weeks.
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