Can I swap out an old Chinese diesel heater with the Air 4D?

Question

Question:

I have one of those generic Chinese heaters already installed. Can I reuse the ducting and wiring if I upgrade to the Air 4D?

asked by: Tyler

0

Expert Reply:

Maybe some of it, but the 4D heater # AU96MR not plug-and-play. You’ll definitely need to replace:

-All electrical components - Autoterm uses specific control logic

-Fuel pump and hoses

-Possibly the ducting - the Air 4D requires 90mm minimum

Exhaust and intake sizes might also differ. The swap is worth it for reliability, but don’t reuse anything critical. I'd honestly just plan on swapping everything out since this kit includes everything you need. Also some of your old kit might not be as good of quality or could be weathered from use.

What makes you want to reuse the parts? Less install time?

expert reply by: Andrew N

0

Tyler

9/3/2025

Yeah, mainly just hoping to save time on the install. Do you think keeping the old ducting would cause problems if it’s a smaller size? – Tyler

Andrew N.

9/3/2025

@Tyler I get it, Tyler, reusing ducting sounds like a shortcut, but if it’s under 90mm it’ll choke airflow and make the 4D run hotter than it should. That can shorten the life of the heater. I’d go with the fresh ducting in the kit so you know the system’s breathing right from the start. Are you planning to stick with the same mounting location, or moving the new unit somewhere else in the rig?

Answer 1

Not at all, Steve. A larger van with decent insulation is right in the Air 4D’s #AU96MR wheelhouse. It gives you faster heat-up times and more capacity if you’re heating both the main cabin and a rear “garage” or bunk. You can always run it at lower…

view full answer...

Answer 2

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

view full answer...

Answer 3

Hello Mel, great question! Yes, the Torklift tie downs part #TL66FV will fit your 2006 GMC Sierra 2500HD crew cab with the 8 foot bed, provided your truck does not have running boards or cab length boards that extend under the bed, and you are not…

view full answer...

Answer 4

Hi Clint, welcome back The HappiJac Original Turnbuckles for Camper Tie-Downs - Stainless Steel - Qty 4 #LC182898 are likely what you are looking for and will be a good in between option (they are actually pretty nice and should last a good long…

view full answer...

Answer 5

Hey Jim welcome back. To determine if you need the TorkLift Camper Anchor Relocation Kit item #TLA7004, you'll have to take a measurement. You'll want to measure from the front bumper of your Palomino HS2902 to the center of the rear anchor…

view full answer...

Answer 6

Hello Josh, I completely understand where you are coming from. When you need long, equal-length turnbuckles to span about 35 inches on a 2022 F-350 with a Lance 1130, the goal is a setup that fits cleanly, installs easily, and stays secure without…

view full answer...

Answer 7

Hey Kent! For your 2024 F-350 Tremor you need the following: -Hellwig Front Anti-Sway Bar - 1-5/16" Diameter #HE36GR -Hellwig Adjustable Rear Anti-Sway Bar - 1-1/4" Diameter #HE44FR Are you adding these for towing or something else?

view full answer...

Can I swap out an old Chinese diesel heater with the Air 4D?

Product Page this Question was Asked From

Featured Help Information

Instructions

Continue Researching