Parts for your 2019 Mitsubishi Eclipse cross-Heater core

2019 Mitsubishi Eclipse Cross heater-core: purpose, servicing and replacement

Yes, the 2019 Mitsubishi Eclipse Cross is fitted with a heater-core. This is documented in Mitsubishi Motors service literature for the Eclipse Cross (GK series) under Heating, Ventilation and Air Conditioning procedures, which include heater-core removal and installation, and in the Mitsubishi ASA electronic parts catalogue listing a heater radiator/heater-core within the HVAC unit for 2018–2020 Eclipse Cross models. These technical sources confirm the heater-core is a standard component on this vehicle.

In the Eclipse Cross, the heater-core is a compact radiator tucked inside the HVAC box behind the dash. Engine coolant flows through it, and the cabin fan pushes air across the core to deliver warm air to the vents and demist the windscreen. It’s a simple bit of kit that does a lot: comfy winter temps, clearer windows, and steady climate control performance.

For owners and workshops in Australia and New Zealand, the easiest way to keep the heater-core happy is to stick to the cooling system service schedule in the logbook. That means:

• Servicing coolant at the specified interval and using the correct Mitsubishi-approved long-life coolant (or equivalent) mixed with demineralised water as per the manual.
• Checking coolant level and condition during routine services, and topping up only with the right type.
• Bleeding the system properly after any cooling work to avoid air pockets that can reduce heater performance.

Typical clues the heater-core needs attention include weak cabin heat, a sweet coolant smell in the cabin, oily film on the inside of the windscreen, damp carpet (often passenger side), fogging that’s hard to clear, or unexplained coolant loss. If any of that pops up, it’s time for a pressure test and an inspection of the HVAC box drains and carpets.

Replacement is do-able but not a quick Saturday job. On the 2019 Eclipse Cross it generally involves partially or fully removing the dashboard and lifting out the HVAC unit to access the core. Depending on the exact procedure used, the A/C evaporator housing may need to be separated, which can require refrigerant recovery and re-gas by a licensed technician. A competent workshop will:

1. Recover refrigerant if required and isolate the battery.
2. Drain coolant and protect interior trim.
3. Remove the dash components to access the HVAC box.
4. Extract and replace the heater-core and O-rings, then reassemble.
5. Refill coolant with the correct mix, bleed air, and verify no leaks. If the A/C was opened, evacuate and re-gas the system.

Done right, the result is toasty heat, clear demisting, and no dramas for many more kilometres.

Popular questions about the 2019 Mitsubishi Eclipse Cross heater-core

Does the 2019 Eclipse Cross actually have a heater-core?
Yes. Mitsubishi’s workshop service information for the Eclipse Cross (GK series) covers heater-core removal/installation, and the Mitsubishi ASA parts catalogue lists a heater radiator within the HVAC assembly for 2019 models, confirming its fitment.

What are the common signs a heater-core is failing on this model?
Tell-tales include a sweet coolant smell in the cabin, foggy windows that won’t clear, damp passenger-side carpet, poor cabin heat, or gradual coolant loss. Any of these warrant a cooling system pressure test and a look under the dash.

How big a job is heater-core replacement on the Eclipse Cross?
It’s a reasonably involved task because the core sits inside the HVAC box behind the dash. Expect several hours of labour, careful interior trim removal, and coolant refill/bleed. If the A/C circuit needs to be opened during the process, a licensed technician must recover and re-gas the refrigerant.