Agreed. Troubleshoot the problem a bit and use the guide in the manual or some of the information on the TFP Wiki to help. Chances are it can be easily repaired.
…. However … if it turns out that there’s a serious issue of damage like a broken blower motor or a leaking heat exchanger, I recommend replacing the heater. Simple problems on heaters are cheap and easy to fix but it is rarely ever worth it to get into repairs that cost hundreds or thousands of dollar especially if it’s going to involve paying labor rates for someone to do the work. The simple fact is you can spend a lot of money fixing it only to have something else expensive on it breaks. Cascading failures are common on equipment like this. It’s easy to get trapped in a money pit of repairs when the simplest and most effective solution is to just replace it. I went down that road with a clothes washing machine once and basically spent enough on repairs to buy a new one. At the end of the day I only kept it going for a couple of years and then was left with a very expensive pile of junk.
Good luck, post questions.
PS - 10 years old is a typical lifetime for a heater. It’s lived it’s life, it may be time to move on.
