Author Topic: Heater  (Read 177 times)

X25DJB

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Heater
« on: January 24, 2023, 09:03:58 PM »
Hi, I have a 2014 petrol hybrid, with which I am pretty pleased. An annoyance, particularly in this weather is that the heater doesn't get very warm, and it takes ages to blow hot.
Anyone else suffered from similar?
Could it just be a jammed main engine thermostat?

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Jocko

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Re: Heater
« Reply #1 on: January 24, 2023, 09:16:40 PM »
It could be, but looking at your annual mileages do you ever go far enough to get it warmed up? Does the blue light on the instrument panel go out? In the winter, from my own experience, it takes about 7 or 8 miles before the engine is fully up to temperature.

X25DJB

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Re: Heater
« Reply #2 on: January 24, 2023, 09:20:47 PM »
Thanks, I'm a little over 12,000 annual mileage. The car only had 7,000 when I bought it. Yes the blue light goes off within a mile, and my usual trip is 12 miles.

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Jocko

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Re: Heater
« Reply #3 on: January 24, 2023, 10:47:59 PM »
Okay. You have recently got the car. The previous owner didn't use it much. I trust the coolant level is fine.
The thermostat could be stuck open or the heater valve may not be opening fully. Do you have climate control or a manual heater system? I know with the manual system it is possible for the cable to slip but I do not know how the climate control governs the temperature.
I have a ScanGauge E that plugs into the OBD II port and actually tells you how hot the coolant gets.

X25DJB

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Re: Heater
« Reply #4 on: January 24, 2023, 11:06:45 PM »
Yes that's right. I am due a service and MOT very soon will get the thermostat checked, that was my first suspicion too. Is the plug in that you have expensive? I'm pretty sure that the coolant level is correct.

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Jocko

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Re: Heater
« Reply #5 on: January 25, 2023, 08:05:17 AM »
The ScanGauge E was fairly expensive but you can get a Bluetooth dongle and an app for a smartphone that does similar.

X25DJB

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Re: Heater
« Reply #6 on: January 25, 2023, 08:14:54 AM »
Thanks I'll Google that

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orangeTomato

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Re: Heater
« Reply #7 on: Today at 10:17:21 AM »
How cold is cold? If the air is just "medium-warm" as opposed to "not heating up at all", the engine might not be loaded heavily enough to generate enough heat through your entire journey.

My mk3 jazz (non hybrid, of course) never really blows hot at this time of year if it's working at light load. The engine just isn't generating enough heat and the cooling system will sacrifice interior temperature to keep the engine warm.

So that's conditions like driving around town or keeping a steadyish 40mph on a flat country road (not much load, lots of cold outside air passing through the engine bay).

If you're confident that you're not losing coolant, I'd suggest  bringing it up to 70mph on a motorway, or finding a hill to drive up. That'll make the engine work a little bit harder, and if the air starts blowing properly hot, there's probably not too much to worry about,
« Last Edit: Today at 10:21:19 AM by orangeTomato »

X25DJB

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Re: Heater
« Reply #8 on: Today at 10:27:08 AM »
Thanks very much. I had never considered that. Obvs in today's fuel market I am driving as economically as possible.

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