car temperature gauge rises then falls

This sensor is nothing more than a thermistor -- a variable resistor that changes resistance with temperature changes. Water pump radiaitor have been changedbars leaks addedblock seal added.

Temperature Gauge Goes Up And Down While Driving The Causes

If this is the case replace it because it will put undue stress on an electrical cooling fan with frequent starting and stopping.

. I also noticed that the AC just blows uncold air out. Have a compression test done to check for head gasket and cracks Feb 14 2014 Cars Trucks. Could be a pin hole in the radiator a bad radiator cap a leak in a hose a loose hose clamp a leaking head gasket.

Some cars have temperature gauges that have been overused possibly because the vehicle overheated in the past causing the gauge to fluctuate too often. Then it will start running fine again. If a head gasket fails the result is usually smoke coming out of the exhaust.

Lets go a little bit more into detail about the different causes. All of a sudden highway patrol blocks off part of the road and have to slow down to a stop. Car not over heating alsowhen going up hill car will act like its not getting power.

If you find that youve got a car running hot but not overheating there might be a few reasons. But when put in gear and driven the temp gauge rises and. Remember to check inside in the heater core as well.

Your 2005 would certainly fall in the modern car category but I cant say for sure that Chrysler center weighted your. Hondas will often turn on with the key off. There is a thermostat in the head which controls the coolant movement.

You are feeling for cold spots in the radiator. The temperature gauge reading starts out as a reference voltage that is sent to the coolant temperature sensor. The most likely cause of this irregularity is a defective head gasket.

To troubleshoot your cars temperature gauge you need to know how it works. Refill and purge the system and look for leaks while it idles once its warmed up. The most common reason your temperature gauge staying on cold is a faulty coolant temperature sensor.

Temp gauge rises when accelerating and drops when not. The rising and falling temp gauge indicates a low water level in the cooling system as hot water is splashed against the sender. I havent actually had it overheat yet as the light changes or Im able to go upon.

Internal combustion is maintained by the head gasket which is located between the cylinder head and the engine block. Does this up and down as you drive down the high way. If the change is rather quick and jumps around the gauge for no apparent reason then it may be a faulty temperature sensor.

Gauge this is completely normal. In some cases it can also be a stuck thermostat causing the engine not to heat up properly. Most likely a corroded and stuck-open thermostat.

This just started happening but after I start the car in the morning or after work and drive it for 15-20 minutes everything is fine. Have you recently noticed that the temperature gauge in your car rises and then falls. A defective head gasket could also make your temperature gauge rise and fall.

When this happens it will cause a car to overheat. Those air pockets cause the fluctuation in the temp gauge reading. This can be checked by warming the vehicle up until the thermostat is open driving the vehicle for a few blocks to get some air flowing through it stop turn the motor off and feel the radiator with your hand.

Be careful the cooling fan doesnt turn on. The Problem is that my temp gauge is going up and down. Answer 1 of 11.

I looked down and see my temperature gauge spike to hot. The car will run in park forever without over heating. A lousy radiator fan can lead to a fluctuating temperature gauge.

A third reason your temperature gauge reads high could be because the thermostat is broken. So Im driving its hot outside 95 degrees cruising down the highway. Have a pressure test done on the coolant system and find the leaks.

Now finding the leak may take a little work. If you are referring to the dip and rise as indicated by the temp. Clogged or damaged radiator Low coolant level Damaged water pump or thermostat Overworked engine.

Temp up to about 34 of the gauge then drops back to the normal mark. The water pump pumps water of course. Then if the gauge falls what happens to the air temp.

The problem is still there. I have checked my coolant fluids and seem to be good I have replaced the thermostat and even replaced the water pump which was a pain in the a. A small leak or evaporation may cause your radiator to slowly lose coolant.

By safe we mean that the head gasket prevents the coolant and oil from mixing as both fluids travel from the engine block to the cylinder head. Air in the system or bad sensor. Modern cars have temperature gauges that are heavily center weighted.

After this period when I come to a stop or put the car into park the Temperature gauge begins rising until it gets to the H. Hello I have a 2002 Honda CRV and i noticed that whenever Im 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. I have a 92 Honda Accord.

This can cause the gauge to get stuck in the hot position. The as the gauge rises the heat will stabilize at HOT. Temp gauge going up and down.

The air should get warm in just a minute before the gauge starts to rise. The most possible cause of this irregularity is that the head gasket may be defective. In town it does the same thing execpt it goes higher and takes longer to come back to the normal mark.

If the temperature gauge reads high it could mean your engine is overheating. Now do the same thing from cold start in city driving or just at idle in the driveway. This constant fluctuation of the gauge can cause the tiny spring or lever inside the gauge to dislodge.

Up to 20 cash back temperature gauge is not steady rises and falls abnormally as driving in town or on the high way. Head Gasket Blown Perhaps in recent times you have discovered your car temperature gauge rises then falls. The head gasket handles the safe and proper circulation of coolant and oil in the engine.

They typically park the gauge at normal over a broad range of temperatures and dont move it past normal until things start getting abnormally hot. Im new to this forum and Im an owner of a frustrating 01 Qx4. It can also be caused by bad wirings between the cluster or the sensor.

When the watercoolant heats to a set temperature such. Another reason your reading might be high is you could be losing coolant. So if it doesnt work as it should the vehicles temperature will rise and eventually it will overheat.

Then watch your gauge and air temp as the car warms up. As the coolant temperature rises or falls the resistance of the sensor.

Why Car Temperature Gauge Goes Up And Down While Driving