4 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
1 of these reports describe a fire, explosion or shock risk.
Costly or dangerous
Mains plug and contacts overheat at maximum power — owner-reported fire hazard
Safety risk
An owner of the TRD40820E reports the plug heats up at maximum power and warns the temperature rises over time, blaming poorly made plug contacts. This is an owner-reported fire hazard on the mains plug, not a manufacturer recall. It came from the 'De'Longhi Dragon4 TRD40820E fire hazard' and 'yangın riski' searches.
What to check. Run the heater at max power only with the plug fully seated in a good socket; check the plug for heat during use and stop using it if the plug gets hot, since a hot plug indicates high-resistance contacts that can ignite.
Body surface exceeds 70°C even in minimum mode — burn risk for children
An owner measured surface temperatures above 70°C even in minimum mode and about 90°C at maximum, calling it a hazard where small children are present. This is an owner-reported burn risk on the hot metal body, consistent with the manufacturer's own 'can become very hot and cause burns' warning. It came from the 'common problems' search.
What to check. Keep children and pets away from the body, and position the heater at least the manual's recommended distance from furniture; the outer surfaces get hot enough to cause burns even on the lowest setting.
Manufacturer warns covering the appliance causes dangerous overheating
The official De'Longhi TRD40820E instruction manual warns that covering the appliance during operation leads to dangerous overheating, and separately advises against extension leads because they may overheat. These are the manufacturer's own documented overheating hazards for this model. It came from the 'common problems' and manual searches.
What to check. Never cover the radiator or dry laundry on it, and avoid extension leads; covering the unit can cause dangerous overheating and a potential fire.
Temperature sensor (part 5210810111) linked to shut-off and overheating faults
A replacement-parts seller lists a temperature sensor (part 5210810111) as fitting the TRD40820E and links it to heaters shutting off unexpectedly and incorrect temperature readings or overheating. This is a weak source (a parts seller, not an owner or recall), so it is kept only as a low-severity component hint for the overheating domain. It came from the 'common problems' search.
What to check. If the heater shuts off unexpectedly or misreads temperature, the internal temperature sensor (5210810111) is a candidate part, but confirm fitment with the model number before buying; this is a parts-seller claim, not an owner or official report.
These reports come from the pages linked under each item: owner forums, repair guides and workshops. They are not a diagnosis of any one unit, and a careful check of the one you are buying still applies.
Text from the Kriko Electric space heaters catalog, version 0.1.1, under the CC-BY-SA-4.0 license.
