Skunkworks11

@Sheriff Thanks for that, just found it a bit strange that the countdown should end a few days over a year since I bought the car. I will be servicing it soon anyway so might just let it countdown and see what it says before doing it.

Hi Everyone Quick question to see if anyone can tell me what a round circle with quarter filled in has appeared on the dash and counts down each day. It's a Skoda Octavia 1.9tdi Estate...2010 Will have had it a year tomorrow and never seen it before Attached a picture Thanks in advance Brian

Cheers for that Westbury63 ....looks slightly different than what I remember when i took air box out to do the radiator sensor which should have been an easy job but Clip that held it in was metal and just fell apart when I tried to remove it and took a while to dig it out...lol Atleast i roughly know where to look now so thanks for sending video clip

Hi Mikek3111 Ambient temp sensor seems to show correct temperature on dash...

Thanks pikpilot. Is this the engine sensor you are speaking of ? I haven't looked/found engine sensor yet, I have changed the sensor on the bottom of the radiator and that was just 2 wires. I will defo look into it and get it changed either way and take it from there.

Hi Westbury63, Yes they definitely can be and this one is...lol Agreed, for the price of the temp sensor it probably worth a go although temp reading on dash looks to be fine. Might try and get the actual output from ECU and see if it matches what's displayed on dash.....failing that just go for sensor change and see. Am i right in thinking said sensor is to the right of the engine under engine cover ?

Just read your recommend post, you didn't half have some trouble tracking down the fault. Atleast you have EML light coming on and fault codes....im getting nothing except fan coming on as and when it pleases. The thing I find strange is, if i turn ignition off when fan is on i hear the fan slow down....start the engine again and all's fine for a short while then it comes on again. I would have thought if the car thinks the engine needs cooling it would come on straight away

Thanks Mikek3111 , will try and track down your post and give it a read... Haven't resorted to help from a garage yet but ive checked for error codes and nothing present.

Update on radiator switch....its now been changed for almost a week and it's made no difference. Fan just does its own thing....engine coolant cold or hot, fan just does its own thing and comes on when it feels like it. Back to the drawing board ☹

@Anddenton 😭...lol well that rules that out. Hopefully radiator switch sorts it tomorrow !!

@silverback1972 thanks, that was the inital thoughts as the idle revs go up to 1000 when fan comes on but don't know if mine has a DPF ... Getting radiator switch changed tomorrow to see if that cures it but maybe i should find out if i do actually have a DPF as that does sound like a good call....cant say ive noticed a change in fuel consumption though

@KenONeill no need to be sorry, who knows, maybe something else in the AC system is to blame..as i don't have any error codes i can only guess at what the fault is and the reason why i posted on the forum. Someone i spoke with thought it might be DPF regeneration but I don't have one so it can't be that...lol Hopefully getting radiator switch changed on Monday so hopefully that cures it, if not its back to the drawing board.

Just a quick update, just been out in car, from cold i drove about 2 miles and temp gauge started going up.....got about 3 notches up from start position so something around 65c and fan came on

Don't believe there has been any great change in fuel consumption, obviously if revs go up due to fan coming on then it has to use a bit more diesel

@KenONeill interesting although AC switch/light is not on when I'm getting the symptoms. It started of with the fan coming on randomly and idle revs of 1000 no matter the temperature of the engine, it has steadily got worse over last few weeks and now runs constantly although takes a few mins after starting for fan to kick in. When i turn car off i here fan slowing down, restart car and few mins later fan back on. Temp gauge in car climbs up to and sits at 90, so as Wesbury63 posted earlier should rule out the engine temp sensor. Open to suggestions, just looking for the most likely culprit as a starting point.... Should also have noted i checked for error codes, of which there is none