The warranty coverage for replacement parts can vary based on the specific terms and conditions set forth by HeaterStoreOnline.com or the manufacturer of the heater. Generally, most warranties cover defects in materials and workmanship for a specified period. However, replacement parts may or may not be included depending on the warranty policy. It is important to carefully review the warranty documentation that accompanies the heater or replacement parts to understand what is covered and the duration of such coverage. Additionally, customers should consider that warranty claims typically require proof of purchase and may also depend on proper installation and usage of the heater. For the most accurate and detailed information regarding warranty coverage for replacement parts, it is advisable to consult the relevant documentation on the HeaterStoreOnline.com website.