What is the tutorial for removing the heater in a Changan minivan?
3 Answers
Tutorial for removing the heater in a Changan minivan: 1. Drain the coolant from the cooling system; 2. Remove the control panel, then detach the cable fastener on the left side of the heater unit, and also remove the screws on the terminal posts; 3. Disconnect the wiring connector behind the blower motor, and place a container under the heater supply pipe below the engine and behind the cylinder head; 4. Disconnect the heater supply pipe behind the cylinder head, and also disconnect the heater return hose on the thermostat housing, draining the coolant from the pipes into the container; 5. Disconnect the control wiring for the blower motor switch, then remove the heater unit. The Changan CS75 has a body length, width, and height of 4650mm, 1850mm, and 1715mm respectively, with a wheelbase of 2700mm. Its engine delivers a maximum power of 131kw and a maximum torque of 265nm.
I've disassembled the heater blower several times myself, and found the Chang'an minivan relatively easy to work on. The general procedure is: first disconnect the negative terminal of the car battery to prevent short circuits. Then remove the interior trim panel or dashboard section in front of the passenger seat to locate the heater blower. Use a screwdriver to remove the mounting screws, and when carefully pulling out the blower assembly, remember the wiring connector positions - don't yank them forcefully. Disconnect the wiring and hose connections (the hoses may contain coolant), using pliers to clamp the hose clamps before removal to prevent fluid leaks. When installing the new blower, follow the reverse sequence and test the airflow after installation. The whole process requires a Phillips screwdriver, wrenches, gloves, and cleaning cloths. The Chang'an's simple design means it can be done in about half an hour, but patience is needed to avoid damaging plastic components. If unsure about the blower model or wiring, it's best to take photos for reference during reassembly. After reassembly, check the AC system seals and maintain cabin ventilation. Regular maintenance can reduce the frequency of such repairs.
Last year, I replaced the heater blower in my Changan minivan by myself when the motor was humming but not spinning. Before starting, I disconnected the battery and chose a free weekend. After removing the lower dashboard trim panel, I easily took out several screws. The blower was tucked in a corner with labeled connectors—I marked their positions with sticky notes before unplugging. The hose couplings were slightly aged, but I carefully twisted them off without leaks. Installed the new blower, tested it, and the fan speeds worked normally. The whole job just required a basic toolset and cost under 100 RMB. Key tip: Lay cloth underneath to catch any spilled coolant during disassembly. If the blower isn’t spinning, accumulated dust might be the culprit—cleaning the filter screen while dismantling helps. Changan’s straightforward design makes it beginner-friendly, though watching online tutorial videos beforehand ensures smoother and safer DIY repairs.
