What Causes the Car Heater to Not Get Hot?
1 Answers
Check the temperature of the two inlet pipes of the heater core. If both pipes are sufficiently hot, it indicates an issue with the air flow control mechanism. Conversely, if both pipes are cold or if one is hot and the other is cold, it suggests a problem with the cooling system. Below is relevant information: 1. Potential issues with the cooling system: The thermostat may be stuck open or opening too early, causing the cooling system to enter the major circulation prematurely. This allows cold air to quickly cool the antifreeze, preventing the engine coolant temperature from rising and resulting in no heat from the heater. Another possibility is airlock in the engine cooling system, which disrupts proper coolant circulation, leading to high coolant temperature but no heat from the heater. 2. Issues with the air flow control mechanism: Insufficient air flow or improper distribution of hot and cold air can prevent the heat from the heater core from being effectively dissipated, also resulting in inadequate heater temperature. Inspect whether the control cable for the heater box's hot/cold air blend door is detached, if the heater blower wheel is damaged, or if the blend door is dislodged. After troubleshooting these issues, the heater should start producing heat.
