Electric Heater Design Review

I need a design review for an electric heater with fan and heating element due to field failures. The specific issues are overheating and electrical shorts.

Key Focus Areas:
- Electrical Circuitry: Review and identify design flaws
- Overheating: Analyze potential causes
- Electrical Shorts: Investigate and recommend fixes

Ideal Skills and Experience:
- Expertise in electrical engineering
- Experience with heating appliances design
- Problem-solving skills for safety issues