If you're experiencing a problem with your heater, the issue isn't typically solved by bypassing the system. Instead, consider these possibilities:
* Faulty Heater Core: This is the most common problem. A clogged or leaking heater core prevents hot coolant from reaching the heater, resulting in no heat. Replacing the heater core is the correct solution, but it's a fairly involved job.
* Thermostat: A stuck closed thermostat prevents coolant from circulating properly, impacting both heating and cooling. This is a much easier and cheaper fix than a heater core replacement.
* Water Pump: A failing water pump won't circulate coolant efficiently, affecting both heating and cooling.
* Low Coolant Level: Check your coolant level. Low coolant means less heat transfer.
* Bleeding the System: Air trapped in the cooling system can prevent proper heat distribution. You might need to bleed the system to remove air pockets.
Attempting to bypass the heater core is strongly discouraged. It's not a simple task, it will likely lead to overheating, and is ultimately ineffective if your issue is a clogged or faulty heater core. It's safer and more effective to diagnose and repair the underlying problem. Consult a repair manual specific to your vehicle or a qualified mechanic.
