Sagitar warm air has low water temperature.

This situation may be that the thermostat is often opened or opened too early, so that the cooling system has a large cycle prematurely, and the outside temperature is very low. Especially when the car is driving, cold air quickly cools the antifreeze, the engine water temperature does not come up, and the warm air does not heat up.

Extended data

Warm air does not need to turn on the air conditioner, but uses the hot air of the engine.

If it is a manual air conditioner, turn the temperature knob to heating, then turn on the fan, and hot air will come in; If it is a semi-automatic air cONditioner, turn the temperature knob to high temperature, then press on, and then turn up the fan. Watch out for ECON. This is an economic model, that is, no air conditioning, only hot air!

Reference source

People's Network-Matters needing attention in automobile heating