Applies to heaters with a mechanical timer switch.
Problem description
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New heater does not heat up after installation
- The timer makes a buzzing sound when turned on but the heater does not start heating.
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Existing heater is no longer heating
- The timer makes a buzzing sound when turned on but the heater does not start heating.
Solution
In most cases the problem is related to the overheat protector inside the heater.
See instructions here: The heater does not heat up