Warm air, no hot water, why is the temperature so high?

The heater water tank is clogged and there is insufficient coolant.

1. The heater water tank is clogged: When the heater water tank is blocked, the coolant cannot flow through the water tank, causing the heater system to be unable to obtain sufficient heat. This is due to dirt, sediment or other impurities in the tank blocking the passages of the tank.

2. Insufficient coolant: The level of coolant is too low, and the heater system will not be able to obtain enough heat to heat the air. This is caused by coolant leakage or evaporation.