Heating problems

[Hirkoos0125]

Hi hope everyone is doing good.

I got issue of my Mitsubishi outlander phev about heating even its blowing cold air even if the temperature is set higher I wonder if it's something to do with setting.
Very much appreciated any advice.
Thanks

 

[twosout]

If you're not running the engine, could it be that the electric heater has failed?

 

[richr]

There's also a known issue with the inline filter that's just before the heater matrix getting clogged. That's not a big job to check and clean - just involves clamping the coolant hoses and disconnecting then pulling out the filter.

 

[BrianTheSnail]

I just bought a 2017 model from a dealer and have this exact problem - blowing cold air into the cabin when the heater should be on. Took it back and they confirmed it's the filter - they are going to replace it.

 

[BrianTheSnail]

I do wonder though why this inline filter is needed, and what is clogging it up. Surely the coolant loop is a closed system? It's not obvious to me what would be getting in there that would require filtering out...

 

[richr]

I’ve thought the same. I can see why they’ve added it though - far easier to pop off a rubber coolant hose and clean/replace a filter than strip the entire dashboard out to replace a clogged heater matrix.
But where is the debris coming from? Unless it’s a consequence of the split heat source setup on models with an electric heater - if the ICE never starts (short, gentle trips with no high heater demand) then the coolant in the engine and radiator will tend to sit around and maybe allows for some oxidation or something to take place that eventually gets flushed through to the matrix when the valve does get opened.

I wonder if the diesel Outlander has the filter?

 

[BrianTheSnail]

Just an update on mine - it took the dealer two days to diagnose the problem, which didn't turn out to be the filter after all - it was a loose electrical connection to the water pump. Nice to have a warm car at last!

 

[PenJurva]

This is what forums are all about!!! I had the same issue and fixed it with YOUR help, thanks

 

[BrianTheSnail]

@Penjurva, glad you got yours fixed - enjoy the warmth!

 

[TF1909]

I have just had this happen to mine and Mitsubishi want £1000 to drop the coolant and clean the filter. Standard charge.
It seems to happen to cars around 40-50K mark. The coolant starts to gets flakes and clogs up the filter which in turn stops the heaters working.
I am trying to find a non dealer who can sort this for me as I think £1000 is a bit over the top in my eyes but may have to go down this route.

I have found this

https://carhoodsecrects.com/mitsubishi-outlander-phev-heating-problem-with-ptc-hater/

 

[Chriseng]

Hi, I have a 2016 phev 5h which has covered 90,000miles now. I first noticed that the preheat was not heating, just blowing air around. So I flush the system and the heater core, mistakenly took the heater valve out thinking the filter was located in there. So put back together and then located the filter and cleaned it out after different flushes. Refilled with coolant, bleed the system for ages. Did a test drive, car began to overheat ( warning on dash) so stopped, let air out and topped the system off and all good but no heating at all?

My guess would be the heater valve, but before I go replacing this.
Wouldn’t the electric heater work with out this? The water pump can be heard pumping so don’t think it is that. And while driving with engine on before the car would heat but not as efficiently as I’d have expected

 

[TF1909]

I have now had mine looked at by a hybrid specialist with infrared and they found it out to be the heater water pump assembly.



Now to get the part!

 

[TF1909]

Got the part and all fitted and working correctly.
Recommend a garage in the Bath area if anyone is in need.

 

[AshSteCar]

Yes please.

Just down the road in Yeovil and my PHEV has no heating either.

 

[TF1909]

I used a company called 4 Avenue Autos. 01761 419 362
https://fourthavenueautos.com/

Fourth Avenue Autos
Unit 33 Fourth Avenue
Westfield Industrial Estate
Radstock Bath, BA3 4XE.

They used infrared on mine to find out the problem. Mechanics name was Alex. Good luck.

 

[nrayanov]

What was the problem?

 

[TF1909]

If you look at the thread above you will see the diagram and it was the heater water pump assembly. Bought one from Ebay. Only found this out when Fourth Avenue autos used infrared goggles to see where the heat wasn't coming through the system. Posted Feb 21, 2023

 

[TF1909]

What was the problem?

If you look at the thread above you will see the diagram and it was the heater water pump assembly. Bought one from Ebay. Only found this out when Fourth Avenue autos used infrared goggles to see where the heat wasn't coming through the system. Posted Feb 21, 2023

 

[Farmer]

Should the heating be fixed if still under warranty? I have the same problem!

 

[Kramarz]

Same problem here, got myself 2018 Outlader PHEV, import from Japan. No heating. Will report what was it in my case, once hopefully solved...