None -unless the engine suffers from "blow-by" caused by excessive engine wear or non-functioning crankcase ventilation system
Bulb is blown or has been removed.
Your Accord is overheating. The fan is running to try and cool the engine off. seek professional help immediately before you destroy the engine.
an engine is hottest after you turn it off. The humming is the cooling fan automaticly running to cool your engine down for longer engine life.
Replace it with the exact same temperature thermostat as the one you removed. Do not run the engine without a thermostat. The thermostat is required to keep the engine running at the optimum temperature that will give the best performance and mileage. If it is overheating running it without a thermostat is not the solution.
160
Shut the engine off. They're supposed to be on all the time the car is running.
You need to determine if it loses spark or fuel when it stops running. Once you have that info re-post the question with that info and include the year and engine of the Honda Accord.
It is not supposed to be on when engine is running unless there is a problem.
A working cooling fan is important in keeping the engine of a car running well. A diagram for a cooling fan in a Honda Accord can be found in its maintenance manual.
It should last the life of the car if you maintain the car as you should. Let the engine start running rich and do nothing to repair this condition and it will destroy the converter. But keep the engine tuned up and running as it should and you will never have to replace the converter. NEVER had a problem with my 1996 HONDA ACCORD engine and CATALYTIC CONVERTER needed to be replaced at 220,000 MILES.
add water or anti-freeze coolant
there are two hoses coming from the radiator. the one on the bottom has the thermostat at the end near the back of the engine.