Or does my tickover rise up now an then of its own accord?

It has to to charge the battery as load goes on it.

A/C coming on Radiator Cooling Fan etc.  Summer time.

Winter Times, Lights, Heater Fan, Radio etc etc .

When the engine is cold the idle speed is usually a little higher. The other thing that can cause it is the regeneration on the DPF. If you've been doing a lot of short trips and no long motorway style trips it could be getting clogged. The raised idle is to heat the exhaust to burn off the soot in the filter. If you also notice a drop in fuel economy and some report a burning smell too that's a dead giveaway its a regen. My car has never, to my knowledge, done a forced regen so this is from other people's reports of it more than my own experience. 

^^^^^ this. Lichfielddriver as my self is a taxi driver, so it's probably the car doing a regeneration. I've experienced it a few times in my car, and yes it does smell a bit while regenerating.

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^^^^^ this. Lichfielddriver as my self is a taxi driver, so it's probably the car doing a regeneration. I've experienced it a few times in my car, and yes it does smell a bit while regenerating.

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my normal weekday/termtime is 100 miles a day school run mainly fast cross country, so i think its the aircon coming on that ups the rpm and maybe reverse?

Mine idles slightly higher when moving, even when only at a few kph.

 

About 100 rpm less when completely stopped.

my normal weekday/termtime is 100 miles a day school run mainly fast cross country, so i think its the aircon coming on that ups the rpm and maybe reverse?

You don't do any stop/start town work in between?

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If you're noticing it in the hot weather and you're not doing short stop-start trips then the aircon is a likely candidate, though I haven't noticed this on my car either. Possibly because it's a 2 litre, so the aircon adds a smaller percentage to the engine load.

Only noticed mine increase to just below 1000RPM on a couple of events... 

 

1. As stated above during a DPF regen it does this, but I also notice not only the smell of burning, but the engine sounds a little different... Just do a 5 mile blast up the road and it's back to normal.

 

2. In Winter... If the car has been standing a short while I notice that even though the car is still "warmish" the tickover rises and the stop start is inactive.. I believe this is to do with the battery management, and helping helping warm the car up a little quicker

I notice it more when the aircon is on, even on the 170 engine.  Also when cold and idling, as mentioned above

You don't do any stop/start town work in between?

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Not term time except saturdays

Not term time except saturdays

Ah, ok. No idea what it could be then other than what has been suggested above.

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Ah, ok. No idea what it could be then other than what has been suggested above.

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are you hack or private hire, if hack, wheres your meter fitted?

 

i slipped up, had it down by the fag lighter socket, need to have it up above the vents

There is a bit of a drag on the 1.6 diesel engine when the air con comes on, first car I have noticed it for a while.

Pity more cars don't use a full electrical system which seems more efficient.

 

I am inclined to only use the ac manually on the skoda for this reason, not being a great lover of aircon anyway..

1 thing i did notice on the superb was the lack of loading when the A/C went on, the Mondeo and Chevvy were very evident on this

AFAIK the Superb's aircon compressor is a variable displacement one, so the load it puts on the engine can be anywhere between the min and max values. It's part of the reason the aircon doesn't hammer fuel economy the same way as it did on older cars too as if the car interior is already cool enough it'll back off to minimal load while the aircon light stays on.

are you hack or private hire, if hack, wheres your meter fitted?

i slipped up, had it down by the fag lighter socket, need to have it up above the vents

Hackney. I have mine above the centre vents.

When I get the Superb III I will get a mirror meter though.

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The Radiator Cooling fan will come on to get the coolant back down to neat 90*oC when the cars Coolant System is up to temp and oil getting hotter.

so as you will feel the RPM fluctuate when sitting due to the A/C,  you may also feel as the Fan  / Fans come on when sitting ticking over.

Just as has been with engines / Batteries for decades now.

Sometimes more noticeable than others, engines, cars, fans, batteries with not a high charge.

When I get the Superb III I will get a mirror meter though.

 

I was in a Mercedes B-Class taxi in Germany last week, it had a rear view mirror meter.

 

What a great idea, it looked very neat, similar to this but without the buttons...

 

I had one in my A6. It is such a nice neat install.

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I didnt like the mirror meter and it was £100 dearer, plus ive got a mirror mounted dashcam now

 

i was quoted £225 (no vat/not regd) locally for a meter or £245 inc vat 25 miles further away (Pitts Nottingham) so i went there....im vat regd 

AFAIK the Superb's aircon compressor is a variable displacement one, so the load it puts on the engine can be anywhere between the min and max values. It's part of the reason the aircon doesn't hammer fuel economy the same way as it did on older cars too as if the car interior is already cool enough it'll back off to minimal load while the aircon light stays on.

 

I was going to ask about the effect of A/C on mpg as we are going to do Spain in August

For properly hot temperatures you might need to put the climate control in the higher power mode to maintain temperature. There are two lights on the Auto button on the climate control. Pushing the button so the right rather than the left light is on switches it to a higher power mode. The other mode is biased towards economy, but more than good enough for use in an Irish climate.

Ah, is that why there are two lights on the A/C button!?

 

one AC on mine, its the eco-cheapo-base-sackcloth model