Biggest problem with the hondas is they have a bad cooling system, they tend to corrode the fins of the water pump due to the reaction between the full alloy block and the coolant. you should start there then the fan switch and radiator and thermostat.
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Re: 94 honda accord
When you blow a head gasket your exhaust smokes like crazy and you can smell the alcohol in the antifreeze, assuming you don't have a leaking water pump. Is your car doing that? The first thing I would check is to see if the radiator fan is coming ON regularly when the car is stopped. It should be kicking in every 1-2min depending on the temperature outside.
I'm thinking your thermostat is probably OK because the car does not overheat when moving, so it has good water circulation, and enough cooling while the wind is blowing through the radiator. So if the fan operation is OK, and there is enough antifreeze of proper mixture, then there might be a problem with the radiator itself. The radiator's efficiency is down due to build-up and possibly cooling fin detachment - that's what usually happens with age.
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Your AC system is supposed to shut down if the engine is hot, as a safety device-make sure when the ac is running , the radiator fan is blowing-it may not be, caused by either a bad relay, blown fuse or a bad fan motor. Make sure your antifreeze is fully up to level, and if you haven't done it in the past 2 or 3 years, get the cooling system serviced with a new thermostat-cheap insurance, you do NOT want to overheat that aluminum engine, because if you do, it will be toast.
The heater core can partially plug (internally) causing heat from only one side of the dash vents. You can try to flush just the heater core itself, but most of the time the heater core asy requires replacement.
Hi dakota_love what we need to verify is if your cooling fan is operating properly, what you need to do is first bring temperature close to redline
(but don't hit redline it may cause a blown head gasket) than you need to open up the hood with the engine running (and temperature close to redline)at and see if any of the cooling fan in front of the radiator is coming on, please update once this part of diag. is completed so we know which way to direct for further diagnostic.
I would suggest checking to make sure your electric fan(s) are turning on. When you are moving they may be enough air flowing through the radiator to cool it enough not to run extremely hot, but as soon as you stop and the air stops it heats up. Check the fan(s) to see if they turning on. If not, check the fuse block ad see if the fuse or relay for the fan is bad. Hope this helps.