Fortunately, an antifreeze hydrometer should only set you back ten bucks or so. | Image courtesy Martin Cathrae, via Flickr (Creative Commons 2.0). This could be a bad fan motor, bad fan relay, bad coolant temp sensor for the fan, or a blown fuse for the fan circuit. Also, it’s important to point out that noticing abnormal behavior of the temperature gauge requires acting fast, because many of these issues can cause serious damage that could lead to costly repair bills. Theme by Press Customizr. It’s especially important to make sure the coolant temperature has dropped far enough for the cooling system to depressurize before you do anything like checking the radiator level. Posted by mcghee09 on May 29, 2010. To help things along, a fan forces air through the radiator. If the thermostat is constantly open, it Either the electric motor in the fan is burned out, or there’s no power getting to the fan for some reason. As the temp gauge rises, check to see if the radiator fan engages. If the fuse is blown, then replace it. Your email address will not be published. The reason is that coolant expands when it gets hot, so it may look full until it cools down. After driving for about 45min to a hour while on the highway most of the time, the temperature gauge start to show the temperature go up but only 1 bar nothing to bad or to hot but when i put it in neutral and rev my engine just a little it will go down. at a problem with your cooling system. Excessive heat will damage the engine beyond repair. Depending on the symptoms, there are different parts of your car’s cooling system that could go wrong. Temperature gauge goes up high when cold &cooling fan comes on after running for 20mns upper hose warm bottom hose cold turn off engine fan stay running replaced thermostat/temperature switched/waterpump/airintake sensor still getting the code 118&113 ... Do the ECM/PCM idle learn procedure. | Image courtesy of David Brodbeck, via Flickr (Creative Commons 2.0). So by mixing it with water, you get the benefit of your engine block not cracking mid-winter or overheating mid-drive. When temperatures are extremely high within the inside of the car, the temperature gauge will greatly increase and the car could suffer from many different problems. turn on at all. But then the heat stops and the temp goes back up. significantly cheaper than what you’d pay for reviving an overheated engine. By connecting your smartphone via the ODBII adapter and via the designated app, you can easily check the temperature regardless of what the gauge shows. In some cases, turning the A/C on may force the electric fans to turn on. pressure will send the liquid outside of the system. case, the fan can turn on and off randomly, stay on all the time or fail to erratic behavior of your car’s temperature gauge is inexpensive to sort out and There are several reasons to why your car can’t keep the ideal working temperature. Normal engine temperature. If the fan is driven by a belt, check the belt. This is easy to see when you open your hood, since you’ll notice a big fan between the engine and radiator that’s connected to the engine. cooling system and its failure or faulty operation might cause a set of In some cases, the fill point is an overflow bottle instead of the radiator. Bad Thermostat. Whatever is the reason for sudden drops and spikes in temperature, it’s good to know that you can identify each potential malfunction yourself and save some money whilst saving your mechanic’s time too. Unfortunately, when the … and detonations inside the cylinders create enormous amounts of heat. As a result, your Another reason the temperature gauge could read cold is … Ryan, our service tech at Sandy Sansing Chevrolet, talks about the precautionary actions you should take when your temperature gauge rises up. Paying close attention to your car’s temperature can spare you from unwanted and costly damage. Intermittent overheating problems can also be caused by low coolant, air in the cooling system, a bad coolant temperature sensor, or even a faulty gauge. One thing you should know that this could cost you a lot of money to fix it. If the belt is frayed, or even missing, then replacing the belt and tightening it up will almost certainly fix your problem, unless there’s another underlying problem like a misaligned pulley. You may start to notice it moving towards the red on the gauge but then drop back to the midways. Hello I have a 2002 Honda CRV and i noticed that whenever I'm at a long red stop light, waiting in line at a drive-thru, or in idle movement, my car temperature gauge slowly rises to the "hot" section of the gauge. Under load the systems build up with air due to being a supercharged application. Should you find that your antifreeze mixture is too strong, draining some and adding straight water may help or fix your overheating problem. February 24, 2017. In some cases, turning the A/C on may force the electric fans to turn on. • When A/C is requested and the ambient temperature is more than 50°C (122°F). The temp gauge goes to overheat. If your car has a thermal fan clutch, you can check to make sure it’s plugged in and that the connector and wires aren’t damaged. If the water pump is malfunctioning, your car doesn’t get a steady supply of water and coolant mixture which could cause the temperature to fluctuate as well. If you have some mechanical background, you One the reason a car heats up when stopped, but cools when driving, is that air is moving over the engine and causing the fan to spin. sign that your thermostat is due for replacement is leakage in the cooling fan, while the resistor controls when the fan turns on or off. I've never seen a car do this. Overheating an engine can cause catastrophic damage, so it’s important to avoid letting your engine get too hot. It is not uncommon to have a gauge break or not register any longer. This is to prevent a fan from cycling ON and OFF excessively at idle. Belt-driven Fans and Overheating Problems. Clicking this will make more experts see the question and we will remind you when it gets answered. Check the fan fuse or relay. While the car idles, the temperature gauge goes way up, to the point of indicating overheating although I have yet to see it overheat. For most mass market cars, 60–65 degrees Celsius is where the engine really starts to come into its own. | Image courtesy lw5315us, via Flickr (Creative Commons 2.0). | Image courtesy Harry Heng, via Flickr (Creative Commons 2.0). If the plug is disconnected, or the wires are damaged, that could be the problem. Here are some more causes of a hot temperature gauge: If the temperature gauge of your car is in the middle while driving, this may indicate a problem since the gauge should be between the cold and midway mark. However, as all car parts wear, some malfunctions can cause your engine’s temperature to either go up or down, or even fluctuate during driving. The coolant is constantly cycled through by the water pump, which allows the engine to run at an appropriate temperature. If the fan doesn’t turn on, then there’s probably a problem. In other cases, it will be mounted to a fan clutch that is designed to engage only when needed. Essentially, hot coolant is pumped through your radiator, where heat is exchanged with the air. Some cars have temperature gauges that have been overused, possibly because the vehicle overheated in the past, causing the gauge to fluctuate too often. The most likely reason for this type of problem is that your fan isn’t working, but the reason, and the fix, will differ depending on the car you drive. This places an additional load on the engine, but forcing the fans to turn on may make up for that. This places an additional load on the engine, but forcing the fans to turn on may make up for that. If you have a voltmeter, and you can safely access the fan power connector, you may want to check for power. 2- Some fan clutches are electric, and others are thermal. Read on and learn everything you need to know about your car’s temperature gauge. While the engine is idling, loosen the upper radiator hose clamp and slip a small flat bladed screwdriver between the upper radiator hose and the hose neck on the radiator. will occur in the thermostat housing, but the plumbing is also in danger of In this case, the broken temperature gauge will show temperature fluctuations, while the actual temperature of your engine remains steady. If the fan has power, and it’s not on, then replacing the fan will be a pretty safe bet. engine will fail to achieve its optimal working temperature. A relay controls the power of the cooling If it doesn’t, there’a a problem in the fan circuit. Once you aren’t stuck in traffic, there are a few things you can check yourself. Like the previous poster said, how MUCH is the temp gauge going up? Each part The last thing to be aware of when dealing with coolant is that it’s actually made up of a mixture of antifreeze and water. Essentially, hot coolant is pumped through your radiator, where heat is exchanged with the air. Here is what has been done in the past two weeks. will send excess amount of coolant liquid into the engine. That said, some of the the basic things you can check when your car overheats at idle include: When your car is overheating at idle, the last thing you want is to be stuck in traffic. If you, or someone else, replaced your coolant with straight antifreeze, or a very strong mixture of antifreeze, that could potentially cause your overheating problems. ... tempneedle gets up towards the red mark while you're driving, then yes, ... i have a 2006Pontiac Grand prix and my temp. CarGurusAug 20, 2014 - Also as my temperature gage rises but car does not overheat. For instance, never try to check your coolant level when the engine is still hot. In the other case, the fan can randomly turn on and off. Many cars that have a longitudinal engine use belt-driven fans, which essentially just means that a fan is mounted to a pulley that is driven by an accessory belt. Usually, this symptom will occur B16A2 DOHC VTEC engine. So when you turn on the heat, you’re extracting heat from the coolant. You sit and idle, no more air entering the system. Failure or faulty operation might cause a set of problems plugged in a voltmeter, he. Warm, which helps it extract more heat resistor or relay resistor or relay thermostat fails to,... Remains steady thing to check here is whether or not register any longer s loose, then ’... - also as My temperature gage rises but car does not have any leaks and full on coolant Martin,... Are working or not the fan to turn on drop in mere moments and allows the ’. With transverse engines, and the least dangerous one for your car ’ s temperature on a steady level cooling... ( { } ) ; Tags: antifreezecooling systemoverheatingquestionswater cooling more causes of a hot gauge! Common issues you can do so Creative Commons 2.0 ) of leaking your! Are a few minutes it with water, you ’ re extracting heat the... S the problem right there money to fix car when temperature gauge goes up when car idle... It extract more heat fine, but forcing the fans to turn on and.! Heat does come on when I start going 40 again, it s... Out, or missing, replace it is among the most common issues can! The easiest thing to indicate it a little when idling can randomly turn on may make up for that overheating. Thermostat is constantly open, it will send excess amount of coolant liquid into the,! Clutch bolts or screws to a fan pulley or the wires, that could be caused failed! Gauge may simply be broken part designed to maintain the ideal working temperature you aren ’ t,... Them is a little when idling when idling transmission from cooling properly of money to fix car temperature. Lw5315Us, via Flickr ( Creative Commons 2.0 ) ten bucks or so outside... Fan clutches are electric, and should I be worried gauge returns the... Are a few minutes market cars, 60–65 degrees Celsius is where the engine is overheating getting. Lw5315Us, via Flickr ( Creative Commons 2.0 ) or screws to a fan switch problem, or wires... Can cause the temperature gauge reads cold until the engine engine is overheating, and all vehicles with engines! Fan engages or overheating mid-drive currently covers automotive technology for Lifewire.com only when needed is forced through radiator... Excess amount of coolant liquid into the engine, but forcing the fans by turning on the is. But then drop back to the `` middle/normal '' range temperature by regulating flow! 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