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Diesel Heater Servicing

Dieselheat is one of the few businesses in Australia specialising in service and repair of diesel heaters, cookers and hydronic furnaces.

We have a full suite of diagnostic equipment for Wallas, Eberspacher, and Belief diesel heaters and we carry spare parts for all these brands.

If your diesel heater has stopped, before you contact us, it is worth running through the procedure on our diesel heater fault finding page as many issues can be resolved without sending your heater for service.

4 Easy Steps to Get Your Heater or Cooker Serviced

1. Contact Us

We will have a quick chat with you to make sure your diesel heater / cooker / hydronic furnace is serviceable and your problems are not related to the installation.

2. Remove the Item

To get your item serviced or repaired we only need the item itself plus ideally the fuel pump, no controllers or wiring need to be sent. If you need help removing the item contact us.

3. Post us the Item

If it’s a diesel heater or hydronic furnace, post it in a post bag (costs less than $20) to PO Box 288 Cygnet TAS 7112. For larger items like cookers we can arrange cheap freight. Make sure your contact details are included.

4. Fix and Return

Once we receive the item we will contact you to discuss its problems before we undertake the repair or service.

After we service your item it will be returned fully tested with a certificate showing its test results and flue gas emissions to demonstrate it is running properly.

For a full list of items we regularly service, see below:


  • Air heaters D2, D4, D2L and D4L
  • Hydronic furnaces D4WSC, D5L


  • Air heaters 2KW, 2.2kW, 4kW and 5kW
  • Hydronic furnaces 5kW


  • Cookers and Ovens 86D, 87D, 88DU, 85DT, 85nDT, 85DP
  • Air heaters 22DT, 22GB, 30DT, 30GB, Spartan, Viking


  • Air heaters 2000ST, 2000STC
  • Cooker X100

Please note, we do not support or service or provide advice for cheap Chinese Ebay heaters.

We have also serviced and repaired many other less common diesel appliances for marine, RV and cabin use, and we are always happy to have a look and help you out if we can.

Information and Buyers Guides
Looking for a diesel air heater or heating system but not sure where to start?
Frequently Asked Questions
Here are our answers to the most Frequently Asked Questions.
Find an Installer
We work with a range of professional installers around the country.


Two Year Warranty

All our products are backed by a minimum two year warranty.

We're here to help

Give us a call on:
0418 130 971

Express Delivery Australia Wide

Freight calculated on check out.