Resistance of heater should be around 30Ω.
No flashing light error messages will be displayed if heater is faulty, the symptoms you describe are exactly what would happen with a faulty heater.
There are two different heaters, depends on type of outer drum, metal or plastic.
If it is a plastic drum you need THIS
The one for the metal drum does not appear to be in the shop, it is a C00088399, an e-mail to email@example.com
should get things sorted for you.
That which can be asserted without evidence, can be dismissed without evidence.