car temperature gauge rises then falls

Start engine turn heater on not defrost and observe coolant level as engine warms up add if necessary. To troubleshoot your cars temperature gauge you need to know how it works.

Temperature Gauge Goes Up And Down While Driving The Causes

Up to 8 cash back Recently I have noticed my temp gauge rise when I am stopped or idling and also when I run the AC.

. No heat in car and temp gauge rises while driving but. All of a sudden highway patrol blocks off part of the road and have to slow down to a stop. Answer 1 of 11.

If your car was built before 1996 install a mechanical coolant temperature gauge made by a reputable company If your car is older than 1996 it will have an OBDII port. Located between the cylinder head and the engine block. This constant fluctuation of the gauge can cause the tiny spring or lever inside the gauge to dislodge.

The temperature gauge reading starts out as a reference voltage that is sent to the coolant temperature sensor. Temp gauge going up and down. Some cars have temperature gauges that have been overused possibly because the vehicle overheated in the past causing the gauge to fluctuate too often.

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. Temp up to about 34 of the gauge then drops back to the normal mark. Does this up and down as you drive down the high way.

The head gasket is an important component of a car engine responsible for sealing the coolant combustion chamber and engine oil pass. It can also be caused by bad wirings between the cluster or the sensor. The Problem is that my temp gauge is going up and down.

Temp gauge rises when accelerating and drops when not. I also noticed that the AC just blows uncold air out. Then it will start running fine again.

If you are referring to the dip and rise as indicated by the temp. If air gets into the system it will compromise its functionality. I havent actually had it overheat yet as the light changes or Im able to go upon.

The problem is still there. Those air pockets cause the fluctuation in the temp gauge reading. A damaged gasket is also a reason for your car temperature gauge going up.

Internal combustion is maintained by the head gasket which is located between the cylinder head and the engine block. I looked down and see my temperature gauge spike to hot. If the thermostat is faulty it may not be opening at the proper temperature and causing the temperature gauge to rise and then falls back down when the thermostat opens.

This can cause the gauge to get stuck in the hot position. Car not over heating alsowhen going up hill car will act like its not getting power. 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.

The car will run in park forever without over heating. The most common reason your temperature gauge staying on cold is a faulty coolant temperature sensor. Of course there are many more reasons a cars temperature spikes so its best to.

It would also explain not getting heat out of the vents when you put the heater on. 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. When the watercoolant heats to a set temperature such.

Have you recently noticed that the temperature gauge in your car rises and then falls. Im new to this forum and Im an owner of a frustrating 01 Qx4. As the coolant temperature rises or falls the resistance of the sensor.

In some cases it can also be a stuck thermostat causing the. The most possible cause of this irregularity is that the head gasket may be defective. But when put in gear and driven the temp gauge rises and.

When a leak develops in the radiator it loses coolant which then causes the temperature to spike. Radiator fan should be off and only come on when engine reaches normal operating temperature for a short time. 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.

This sensor is nothing more than a thermistor -- a variable resistor that changes resistance with temperature changes. The most likely cause of this irregularity is a defective head gasket. It might also be due to a bad temperature sensor.

Now finding the leak may take a little work. Unfortunately the problem is still there. At first I thought it was the fan clutch which I recently installed 2 days ago.

I have a 92 Honda Accord. So Im driving its hot outside 95 degrees cruising down the highway. Refill and purge the system and look for leaks while it idles once its warmed up.

Your 2005 would certainly fall in the modern car category but I cant say for sure that Chrysler center weighted your. When it damages it can cause serious problems for your car. Up to 20 cash back temperature gauge is not steady rises and falls abnormally as driving in town or on the high way.

Water pump radiaitor have been changedbars leaks addedblock seal added. Top it up if needed to 1 or 2 inches from top. Get a device to plug into that port to read the coolant temperature.

With engine cold remove rad cap check level in rad. However it begins to fall back down once I start to drive. Perhaps in recent times you have discovered your car temperature gauge rises then falls.

Air in the system or bad sensor. Gauge this is completely normal. 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.

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. In town it does the same thing execpt it goes higher and takes longer to come back to the normal mark.

There is a thermostat in the head which controls the coolant movement.

Strange Behaviour Temperature Gauge Mercedes Benz Forum