M.kaya
deeper sona
Hei I bought a Deeper Sonar that was used for one season. After only a few uses, the temperature sensor started showing incorrect readings, so I contacted Deeper and sent it in as a warranty claim. They concluded that the cause was user error, without giving any proper explanation, and therefore stated that it was not covered under warranty. Instead, they offered me a more expensive model with a 25% discount, but even after the discount it is still cheaper to buy it from a store here in Norway. I explained that the sonar was used for ice fishing in temperatures between -10°C and -20°C, where it is possible for the sealing gasket to shrink and allow water to enter. However, they claimed that the seal is designed for such temperatures, without testing the product under those actual conditions. As a user, it is difficult to do anything wrong when attaching the cover correctly, with the arrows aligned toward each other exactly as described in the instructions. I find this very disappointing when buying such an expensive product and expecting better quality and customer service. To me, this feels like a disposable one-season product, and I would strongly advise others not to buy it.
Response from DeeperMay 29, 2026
We're sorry to hear that you were disappointed with the outcome of your warranty claim. We would like to clarify that our conclusion was not based on assumptions. During the inspection, water ingress was confirmed inside the device, and extensive waterproofness testing was performed afterwards. This included a high-pressure enclosure test, inspection of the sealing gasket, and a waterproof immersion test. No cracks, housing defects, gasket defects, or other manufacturing issues were identified. We also considered your question regarding ice fishing temperatures. Deeper devices are designed to operate in temperatures ranging from -20°C to +40°C, and both the sealing gasket and enclosure are specifically engineered to maintain waterproof integrity within this operating range. Deeper sonars are regularly used for ice fishing in conditions similar to those you described. While it is not possible to determine the exact moment when water entered the device, our diagnostic testing confirmed that the sonar enclosure and seal remained waterproof and no manufacturing defects were identified. In cases such as this, the most common causes of water ingress are the top cover not being fully secured before use or the device being exposed to moisture for an extended period without the top cover installed. Because the device passed all waterproofness tests and no manufacturing defect was found, we could not classify the failure as a warranty case. We appreciate you taking the time to share your experience and are genuinely sorry that we could not provide the outcome you were hoping for.