2002 Ford Explorer "car temp guage rises drops" Questions

Temp guage Rises/almost oveheats when Heater is on. Temp Rises to almost H then drops fast to just above C and repeats but only while heater is on My daughter 96 Ford Explorer Temp normaly runs about ...

Temp gage rises to hot and then drop immediately back to normal. Plenty of water in system. What could be causing problem. There may be two reasons for your problem. The thermostat may be out of ...

...Temp guage rises as car warms up , then just drops back to start. 1 have replaced coolant temp sensor.Is there only one sensor ,or if there is more may be I have replace the wrong one. William Could ...

...temp guage slow to rise but car feels if overheating. My son has a 98 camry. He recently noticed that the temp guage was slow to come up to middle (usual running temp) and would drop down when going ...

...car at idle, temp guage at normal & heater blowing hot , took car for run , temp guage off scale blowing cold , drop back to normal still blowing cold, then warm , temp guage swinging from norm to ...

...CAR HAS A TENDENCY TO INCREASE IN TEMP IF ON A CONSTANT SPEED OF 140KM. IF THE SPEED IS DROPPED TO 100KM THEN THE TEMP DROPS TO THE NORMAL OPERATING TEMP WHICH IS ABOUT HALFWAY ON THE GUAGE. THE FAN ...

temp must be normal,guage at zero and heater air drops. As long as I leave the engine running, even long drives, temp remains normal, gauge OK. . ONLY when I shut it off will the thermostat apparently

Car never overheats and this temp gauge peculiarity seems to be more pronounced when A/C is on and outside temp is over 90F. (triggering the radiator fan frequently to compensate for heat) I read in a

...guage drops to 0 !!! Then comes back and down again ! The truck runs fine dispite the irregularities intermittenly otherwise . There is no clattering or temp riseing while driving. Still need the ...

...temp guage indicates) to ~195 deg (thermostat rating) and then after (I assume) the thermostat opens the temp will drop to ~160 and stabilize there regardless how long or hard the engine is run... I ...