Why is the heater not hot in FAW Besturn B70?

There are several reasons why the Pentium B70 heater is not hot: insufficient coolant, damaged thermostat, blocked heat exchanger, circuit failure of the heater system, etc.

1. Insufficient coolant, the reason is that insufficient coolant causes damage to components of the engine water circulation system, leakage of interfaces or cylinder gaskets, etc. , which makes the heater ducts not hot because only a small amount of coolant circulates or not at all. Solution - To ensure that the engine water circulation system is normal, just add coolant. If there are other problems, repair them first and add coolant to the normal level. 2. Thermostat, reason - the thermostat was removed from the last maintenance due to excessive water temperature or damage in the normally open position, causing the engine water circulation to remain in a large cycle. In addition, the external temperature is low and the heat dissipation is good, so the engine water temperature is difficult to rise, so the warm air is not hot. Solution - Install or replace a new thermostat. 3. Warm water tank and heat exchanger, reason-A Some automatic transmission models are equipped with a heat exchanger on the gearbox. The engine coolant enters the warm water tank through the heat exchanger. If the heat exchanger is blocked, the warm air will not be hot. b There are also some models with exhaust ports near the heater box. If the exhaust is incomplete, the heater will be tepid. Solution – If there is a vent, vent it first. If you cannot feel the two warm water pipes with your hands, and if the temperature difference is large, you can blow the warm water tank or heat exchanger directly with a water gun or air gun. 4. Heating air control mechanism, the reason is because of the hot and cold servo motor of the empty panel. The heater water valve and other components are damaged or the heater system circuit is faulty, causing the heater to fail to function properly. Solution - find out the cause and deal with specific problems in detail.

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