About this site and how pages are compiled

Diesel Heater Fix is an independent reference for people troubleshooting Chinese diesel air heaters: the 2 kW, 5 kW and 8 kW parking heaters sold under names such as Vevor and Hcalory, and under no name at all. It is not a review site and it does not rank products.

What this site does, and what it does not do

The pages here are compiled from two kinds of material: the manuals that manufacturers and sellers publish, and what owners report on public forums and in owner communities. Those are read, compared and written up in plain steps.

There is no test bench behind this site, and these checks have not been run on heaters of our own. You will not find first-hand test claims here, and there are no author profiles with invented workshop careers. If a page cannot be traced back to a manual or to several independent owner reports, it is not published.

What the labels mean

• Stated in manufacturer manual: the statement comes from a manual or official troubleshooting guide, which is listed under Sources on the same page.
• Reported by owners: the statement comes from people describing their own heater on a public forum. A cause-and-fix pairing is used only when at least three separate owners, in separate discussions, agree on it.

Numbers such as voltage limits, pump frequencies and temperatures are copied from the source that states them. Where the sources give no number, the page says so instead of supplying one.

Why the controller comes first

These heaters ship with several unrelated controller designs, and the same code number can mean different faults on each. Every page therefore starts by asking which controller you have. If you skip that step you can end up chasing the wrong part.

Independence

This site is not affiliated with, endorsed by or sponsored by any heater manufacturer, importer or seller. Brand and model names appear only to say which equipment a page applies to. See the affiliate disclosure for how the site may earn money.

Corrections

Manuals for these heaters contradict each other, and clone makers change parts without notice. If something here does not match your heater, or a source link has gone dead, write to [email protected] and say which page and which controller.

Limits

A diesel heater burns fuel and produces carbon monoxide. Nothing here replaces the manual that came with your heater, local regulations, or a qualified technician. Read the safety page before you open anything.