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Technical Relationship between coolant temperature sensor and thermostat

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Technical Relationship between coolant temperature sensor and thermostat

atom0007 said:
Do you have any connection to that company you linked to?
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I bought one off them thats all. I am not even recommending a portable one as the novelty soon wears off and filling/distilling/pouring/mopping up spillages all takes up time daily

a glass container jug would be a lot better, mine is plastic.

Quite frankly, an automatic W.D. system that requires little time in terms of maintenance and preparation for me makes most sense. I can personally prove any benefit, i just like the pure taste better.
 
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atom0007 said:
Tremendous, getting more off topic now, but what about The Dead Sea and Mono Lake? Or acid rain. Or bio precipitation?
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Not sure mate, but i believe salt water sources form as a result of evaporation within hydrologic cycle, while the mineral deposits stay where they were.
Similarly distillation brings water to the boil and the steam is then taken up through a tube and drips out elsewhere. All the crud in the water is left in the bottom of the distiller.

[ame]http://en.wikipedia.org/wiki/Water_cycle[/ame]
 
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benny279 said:
That's the information I can give you based on those two things, for your issue I suggest testing the CTS by unplugging it and put the ignition on - this will test to see if the ECU see's the sensor unplugged this in turn will activate the cooling fan to turn on because it thinks the car is overheating so the ECU protects the engine from overheating!

Now in a likely case, I'd say you either have a dodgy temp sender sensor or the CTS is fubar'd!

Do you get any heat from the fans after running the car for like 10-15 minutes? Like cold and hot at request?

Ben
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If a removed functioning CTS causes the fan to come on, wouldnt a plugged in non-functioning CTS also cause the fan to come on?

Cheers.
 
puntonew said:
If a removed functioning CTS causes the fan to come on, wouldnt a plugged in non-functioning CTS also cause the fan to come on?

Cheers.
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If the ECU receives no signal from the CTS it will most likely turn the fan on, because ECU relies on that sensor to find out a rough reading of what the coolant temperature is at, without it, ECU is clueless of it, like for example if crank sensor stopped work, car would attempt to turn over but wouldn't fire because ECU needs data off that sensor to know when the pistons are at TDC and when to start the firing of the pistons etc.

Hope that helps.

Ben
 
benny279 said:
If the ECU receives no signal from the CTS it will most likely turn the fan on, because ECU relies on that sensor to find out a rough reading of what the coolant temperature is at, without it, ECU is clueless of it, like for example if crank sensor stopped work, car would attempt to turn over but wouldn't fire because ECU needs data off that sensor to know when the pistons are at TDC and when to start the firing of the pistons etc.

Hope that helps.

Ben
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Yes mate that does help(y)

so

if the CTS is dead, the fan should come on anyway with the CTS in or out?

if the CTS works, the fan should come on with the CTS removed?

But we could have a partially faulty CTS that if left plugged in wouldnt necessarily make the ECU cause the fan to come on?
 
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puntonew said:
Yes mate that does help(y)

so

if the CTS is dead, the fan should come on anyway with the CTS in or out?

if the CTS works, the fan should come on with the CTS removed?

But we could have a partially faulty CTS that if left plugged in wouldnt necessarily make the ECU cause the fan to come on?
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You would have to test the cts to find out if its faulty, if unplugging the cts and no fan comes on would indicate its faulty. If fan comes on, then your problem is elsewhere.
 
puntonew said:
Yes mate that does help(y)

so

if the CTS is dead, the fan should come on anyway with the CTS in or out?

No not necessarily. It depends HOW the CTS has failed. sometimes they fail "open circuit" if this is the case then your fan would be on al the time. Sometimes they fail partially or closed circuit. This would mean the car would think its still cold, and the fans would not come on (even if the engine is overheating) and your fueling would be well off, meaning the car would be running roughly.

if the CTS works, the fan should come on with the CTS removed?

No, disconnecting the CTS will only test your fan control circuit. Even if your CTS is faulty, if you disconnect it, the fan will come on.

But we could have a partially faulty CTS that if left plugged in wouldnt necessarily make the ECU cause the fan to come on?

Yes thats correct. If its partilly failed it might be constantly telling the ECU the coolant temp is say 50oC (even though it may well be 95oC and therefore no fan will come on, plus fueling will be out.
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Alan
 
well there was no thermostat inside the thermostat housing so no wonder it was running cold.

Doesnt seem that the hole is big enough for the stat to drop inside the engine, and i cant feel any loose parts, so i presume someone removed the stat from the housing at some point :confused::confused:
 
puntonew said:
well there was no thermostat inside the thermostat housing so no wonder it was running cold.

Doesnt seem that the hole is big enough for the stat to drop inside the engine, and i cant feel any loose parts, so i presume someone removed the stat from the housing at some point :confused::confused:
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It's a common bodge. There are idiots around who think that it will somehow make the engine produce more power (brain cell count required). More commonly, it's done in an attempt to mask symptoms of overheating.

Replace 'stat with an OE one, proceed with extreme caution.
 
i'd be asking - where is the stat

If the car is overheating in traffic, they've removed stat to allow 100% flow
and mask the fact there is an issue, like the fan has stopped working

Avoid aftermarket stat's, there are alot of us on FF who have got aftermarket, and now finding there going lazy (not regulating and loosing heat now its dropped a little cooler)

New original Fiat Stat is the only way to go at the moment


ziggy
 
puntonew said:
well there was no thermostat inside the thermostat housing so no wonder it was running cold.

Doesnt seem that the hole is big enough for the stat to drop inside the engine, and i cant feel any loose parts, so i presume someone removed the stat from the housing at some point :confused::confused:
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http://www.ebay.co.uk/itm/Continent...arts_Vehicles_CarParts_SM&hash=item3f1e1d0b85
stat transplant a success. now the dial is sitting bang in the middle between C & H and the car is running somewhat better and more fuel efficient.

Maybe the missing stat was removed from the housing as it was stuck closed..........great fun DIY mechanicing on the punto as a 10mm socket tends to fit most things :slayer:
 
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when the punto thermostat opens as the engine approaches correct operating temperature, does it make an audible noise that lasts for about 10 seconds?
 
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