When your thermostat is off, your car still needs coolant. Usually, coolant needs to be authorized by the thermostat to circulate, but as the name suggests, the heater bypass tube bypasses that. The effect of this tube is that extreme pressure will not build up within the system whenever the thermostat is less active, like when the car is starting up. By working in conjunction with your car’s cooling system, the tube is able to keep your coolant circulant and never stuck in the wrong place.

Common Signs And Symptoms That You Need to Replace A Heater Bypass Tube

• Puddle of coolant under your car
• Coolant leaking into internal engine
• Coolant smell (abnormal) is noticed

How Important Is This Service?

Like many of the issues with coolant tubes and other parts of your cooling system, the result of a malfunction is almost always a risk of overheating. It is vital you have repairs done before your costs get far more expensive. Additionally, the symptoms are almost identical to the other areas of your coolant circulation system, and so it is hard to distinguish what is actually broken. We suggest you call a certified mechanic for an inspection if you are having trouble figuring out the issue. You wouldn’t want to accidentally replace the wrong part, but if you have questions, feel free to chat with one of our experts.