airtonics bunk heater as part of thermo king tri pac apu, doesnt blow at all

If its the first time your trying to run it it could take several starting cycles for it to actually fire up. Once you set the control to heat within a minute or so you should be able to hear a sort of slow click...click...click type sound which would be the fuel pump for the heater pumping the fuel. Other than the sound of the fuel pump the heater is pretty quiet until it starts to fire.

1) The blower does come on first however it spins really slowly till the heater start to fire up then it speeds up.
2) I would check fuses for it, if you have a thermal king APU there will be in a black box which is has the main control board for the APU and heater its probably under the bunk or in the side box somewhere. I can't recall what fuses would be for the heater right now but I could check tomorrow if you do in fact have a thermal king unit.
3)With the price of these little heaters it will probably be much cheaper to fix what you have.
4)I don't know of any rules against it but I'm fairly new here.

Edit: just re-read the title and saw you do have a thermal king APU :smt101

 

There is a good chance the ecu on the espar unit is locked out, meaning that the ecu wont allow the heater to come on because of multiple failed start ups. May need to go to a shop with edith software and get the ecu unlocked, and troubleshot

 

They are designed not to blow cold air starting up. It might take 5 minutes to heat up before it's fully operational and blowing. If you never used one turn it on and wait.
Just the opposite shutting down. It will continue to blow to cool the unit down and then shut off.

The igniter has a limited life span and needs changed if you have problems. That's the most common problem of failed starts.

A picture of your controls would speak a thousand words.

Here's a factory pdf, I'm still trying to find the manual. I remember there is one somewhere. These are just brochures. The second one explains the controls if you have that controller.

http://www.espar.com/fileadmin/data/countrysites/EB_Kanada/pdf/Airtronic_D2-D4-D5_Spec_sheet.pdf

http://www.espar.com/fileadmin/data/countrysites/EB_Kanada/pdf/smartcontrollers_digi_multi_max.pdf

The service portal now requires registration. You can create an account if you want to get access to repair info. They use to have a manual.

https://esso.eberspaecher.com/login...stPage=https://espar.eberspaecher.com/help/##

 

They usually don't tie into the TK unless it was all installed at the same time which factories are doing now. Usually older trucks the factory installed just the heater and the APU was added later and they both have independent controls.

It can be 50/50. That's why I asked for a picture. There is like 6 or 7 different control heads.

 

That click...click....click noise the fuel pump makes is driving me crazy. I can not sleep with that clicking sound. Any ideas how to quiet it down? I put a piece of plywood between the bottom of the bunk and the frame the heater is in, but it didn't help much at all.

 

Try sleeping your head pointing away from a fuel pump.. That what I was told not install that pump below my head when I bought a heater.

 

first of all - pull air tronic fault codes.

I use timer from air tronic, it shows codes!

Other way - I have Mercedes Star Diagnose with probe cabel and It reads Webasto and Ebershpaher codes.

 

Hey just checking if I can post here