Installing a Heater Core
Author: Nationwide Autoparts Date Posted:27 September 2017
How do I diagnose a faulty heater core?
If you suspect your heater core is faulty you should first inspect the heater hoses for any leaks, cracks or escaping steam as well as inspecting the passenger compartment. Pull back the front passenger floor mat and inspect for any dampness or staining from leaking coolant. You can also turn the heater fan on low and smell the air coming from the vents for possible coolant leakage.
How do I replace a heater core?
To view a basic guide as to how to remove a heater core from your vehicle, simply view our Heater Core Installation Guide.
How do I select which heater core matches my vehicle?
To select which heater core matches your vehicle, simply search for your vehicles make and model using our user friendly searching navigation on our homepage. www.nationwideautoparts.com.au If you have any further questions you can contact our customer service team on 1300 529 723.
Heater Core Installation Guide
The following is a general guide to the removal of the heater core element from a vehicle.
As they are located inside the vehicle under the dashboard in most cases, you will need either experience or a full workshop manual and patience.
WARNING: ANY WORK THAT REQUIRES DEGASSING OR REGASSING OF AN AUTO AIR CONDITIONING SYSTEM MUST BE CONDUCTED BY AN AUTHORISED OPERATOR.
DO NOT ATTEMPT TO DEGAS OR REGAS A CAR AIR CONDITIONING SYSTEM YOURSELF.
Do NOT commence the below process until all gas has been removed from your car's air conditioning system by an authorised operator.
1. Disconnect the heater hoses near the firewall by undoing the hose clamps.
2. The next step is inside the vehicle and requires the removal of all the dashboard sections as you need to get to the heater core and/or the heater box unit. This is the section where a full workshop manual will take you through the process step by step.
3. Often the heater core is located next to the evaporator. If the evaporator unit needs to be removed as well, the air conditioning system will need to be degassed by a licensed and authorised auto air conditioning specialist.
4. Once the heater has been removed from the vehicle, compare it to the new unit and reverse the process for reinstalling the new heater.
5. Always use new hose clamps when reattaching the hoses. The car can then be regassed. Regassing should only be undertaken by an authorised and licensed operator. They will know the correct procedure and the correct quantity of gas to use.
6. Once the car is all back together, make sure you completely flush the whole cooling system removing all of the old coolant before refilling the car with quality coolant.
7. Run the car with the heater on and the fan going making sure it heats up correctly and that all of the air is removed from the cooling system. Once the car is cold, recheck the water level and top up if necessary.