The washing and rinsing stages serve different purposes, and a warm wash does not mean that the laundry must feel hot at the end. The programme's finishing sequence needs to be considered before judging heating performance.
Understanding this situation
Clothes removed after a rinse and spin can feel much cooler than they were during the main wash. Door glass is also affected by its construction and surrounding air. Neither the final fabric temperature nor a brief touch of the door is a reliable standalone test of the heater or temperature sensor.
A useful next step
Describe an apparent heating concern through the chosen programme, whether it completed, any warning and a changed cleaning result. Avoid opening the appliance or interrupting a hot wash to test the water. If clothing is unexpectedly very hot or there is a burning smell, stop using the machine and report that specific safety-related change.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.