Analysis of common failures of parking heaters

1. Nothing happens after booting
a. No power input. Measure whether the heater power supply is normal according to the circuit diagram, and check the vehicle insurance and line power supply. Check the power supply, check the power-on signal wire, and check the ground wire.
b. Thermocouple problem: Phenomenon: Measure both ends of the thermocouple, and the resistance value is 0 ohms.Reason: The two outgoing wires of the thermocouple were connected to the shell, causing the ignition sensor to be grounded.

2. Indicator problem
a. The indicator light is always on. Maybe the control circuit is broken, or the ground wire is not connected.
b. The power-on indicator flashes
The fault location can be judged according to the flashing frequency of the parking air heater indicator light against the fault flash code table, and the corresponding parts can be repaired or replaced.

3. The car diesel heater emits black smoke
a. Heater carbon deposits, clean carbon deposits.
b. The fuel injector or filter or oil pipe is blocked, clean or replace the corresponding parts.
c. The oil pump pressure becomes smaller, adjust the oil pressure back, and replace the oil pump if necessary.

4. The parking air heater works normally, but fires repeatedly. Reason: When the hot spot is heated, the internal furnace wire will be connected to the shell, causing the ignition sensor to short circuit. The controller considers that it is extinguishing the fire and the ignition sensor needs to be replaced.

5. The heating effect is not obvious
It shows that the heater is overheated, and the radiator and defroster are not hot. Reasons: The water return port is too thin; there is gas in the circulating water circuit; the hose is bent; there is foreign matter in the circulating pipe; the water pump is faulty; the water inlet and return valve is not opened, the engine thermostat is opened too early, etc., find out Reason to repair accordingly.

parking air heater


Post time: Sep-09-2021