Hello Bill Mullen.
We are sorry to hear about this experience. Wearable parts only carry a 90-day warranty from the time of purchase. Trimmer spools are often considered consumable parts and are not typically covered under the standard warranty for the trimmer itself. This is because they are subject to wear and tear with normal use and need to be replaced periodically. A trimmer head might need replacement sooner than expected due to several factors, including bumping against hard surfaces, using incorrect trimmer line, or having a worn-out head. Over time, the head can become worn down, making it difficult to feed more line, especially when trimming thick grass or against hard surfaces. Additionally, using the wrong type or size of trimmer line, or letting the line get too short before bumping, can also contribute to head wear.
We hope you will find this information useful. If you require any additional support or have questions regarding a product, we recommend try our Q&A section on product's page or Chat with us direct on our website www.greenworkstools.com.