Sk0daL0ver

Hijacking this thread! I've had a similar issue for a while with my 2015 octavia diesel 2.0L. Very slow coolant loss for probably 1+ year. Maybe had to top up every month or two, but recently since doing a full coolant flush it has started leaking quicker. Today I noticed a pool under the car so decided to investigate. It looks like the leak is coming from the cam belt housing so likely its the water pump. See photo below, wet coolant residue in red, and water pump suspected location in green (can someone confirm??) This is strange though because I had it replaced less than 40k miles ago. Is this a known issue? Is there anything else it could be before I replace the water pump + cam belt? Thanks in advance, and hope this helps the OP!

Sorry for the delayed reply. Finally got round to having a look at this today. I followed your instructions and did a full flush, and new heater core + new header bottle and now I have toasty warm heating on both sides!!! Thank you so much for taking the time to post. Even though the old core was still getting hot, it obviously wasn't getting sufficient flow to heat the air. Just to add to your instructions, I found getting someone to hold the car at approx 1.7K revs sped up the recirculation quite a bit. Screenshot attached showing temperatures compared to before!

Please help explain this as I am loosing the plot! The heating in my 2015 Skoda Octavia 2.0L Diesel is very poor, especially on the passenger side. It takes a long time to heat up, and the air flow isn't great especially on the passengers side. My OBD reader confirms this, after driving for 1 hour, passenger side reads 18 degrees and the drivers side read 40 degrees. (see screenshots). I have checked/done the following: Recalibrated the climate system Inlet and outlet of heater core are both too hot to touch, so unlikely to be blocked I have checked all deflector flaps/servos between the heater core and vents and they are functioning. I have checked for blockages between the heater core and vents and there is nothing stuck. Cabin filter is ok. My current thoughts: Fan needs replacing? But this wouldn't explain the poor heat. Partial blockage on one side of heater core? This might explain the difference in heat between sides. I can see with an endoscope that there is clear flow to the core from the vents. I have attached screenshots from sensors showing temp readings. (What is the windscreen temperature sensor and why is it 18000 degrees?! Could be causing issues?) Please let me know if you have any ideas as I'm sick or driving to work in the cold!