* Faulty rear heater core or blower motor: The most common reason. These components are responsible for distributing heat to the rear of the van. A malfunction in either will result in no rear heat.
* Blocked vents or ducts: Airflow to the rear might be obstructed by debris, collapsed ducts, or improper installation during the conversion process.
* Issues with the heating system's plumbing: A leak in the coolant lines leading to the rear heater core would prevent hot air from reaching the rear.
* Electrical problems: A faulty relay, wiring harness, or blown fuse could interrupt power to the rear heater system.
* Improper installation during conversion: The rear heating system might not have been properly installed or connected during the van's conversion to a passenger vehicle.
* Separate climate control system failure: Some conversion vans might have completely separate climate control systems for front and rear. In that case, the issue is isolated to the rear system's malfunction.
In short, the lack of rear heat is a significant comfort issue, making rear passengers uncomfortable, especially in cold weather. In extreme cases, lack of heat could pose a safety risk, particularly for vulnerable passengers like children or the elderly.
