The old water heater is too hot.

1. According to national regulations, the service life of water heaters is 8 years. If the service life exceeds 10 years, there is a safety risk. For example, some seals or internal pipe joints may fail. I suggest changing it.

2. Due to the design reasons, the old water heater will produce higher water in summer, and it is useless to adjust it in the water heater. The temporary solution is to replace the faucet in the bathroom with a mixing valve and adjust the ratio of cold water to hot water, which should solve your problem. This part can be bought in general plumbing shops, and the price is around 300 yuan.