92 accord radiator fan not working

Radiator cooling fans not working ?

Radiator fans come on only when engine reaches certain temperature or AC is switched on.

The engine cooling fan is located on the front of the engine between the radiator and the engine block. You do not feel it through the ac vents.

CHECK TO SEE IF COOLING FAN IS RUNNING.IF NO CHECK COOLING FAN FUSE AND RELAY.THE COOLING FAN NEED TO BE RUNNING WHEN AC ON BECAUSE AIR CONDITIONER PUT A LOAD ON ENGINE.COOLING FAN KEEP RADIATOR AND AC CONDENSOR COOL.FAN NEED TO RUNNING.

About the only thing that you didn't list is the cooling fan. Are you sure that it's working properly? Drive the car until the engine starts to get hot. After awhile you should hear the cooling fan come on. After you have driven the car for a while, park it and open up the hood. If the upper radiator hose is almost too hot to touch, then check to see if the coolant fan is running. If it isn't, then turn the AC switch to "AC MAX". If the fan still doesn't come on, then a malfunction is indicated. Try to locate the fan control relay and swap it with another relay that has the same part number. Use a relay that will allow the engine to run. Allow the engine to reach operating temperature and see if the fan comes on after switching the AC switch to "AC MAX". If the fan now operates, then replace the relay. I hope this is helpful to you. Thank you for trying Fixya.com. If this does not solve your problem, then post a comment and I will respond by getting into more advanced diagnostics.

IT DONT WORK THAT WHY. (on/off)
NO ENGINE STATED, SO on exact answers. 4.0L or 4.7L ???
The engine cooling and HVAC rules govern this (computer tables and logic)
the service manual cover that,
did you SCAN the PCM at the failure then scan it again after, no?
did you know some cars run the fans parked to prevent overheat soak damage to the engine and trans? all have hood sticker warning telling you to stay way from fans, , until fully cooled engine or pull battery neg lug for safety. just saying that so you are safe fiddling all cars.

the fan(s) run via truth tables, logic (computer)
if cold outside why run a fan?, and waste fuel and cause green house gasses for fun. or make noise for fun, answer it doesn't.
it runs the fan ONLY when needed, is the answser
and is very complex, the newer the jeep gets.

On most cars even as old as 1995 , the condensor fan control would stay off if ambient temps are below 50f. this is not new logic.
Chapter 24 covers HVAC. in The service manual SM.
not only that, you failed to test the AC per the SM and failed to scan the PCM to see if there are HVAC faults. causing this fan disablement's. on purpose.
this car come with 2 type HVAC, manual and ATZ (climate control fancy) the rules for each are not the same (potentially)
the PCM controls the radiator fan on the 4.0L with a relay.
so is 100% pure (ATZ/BCM/PCM) logic doing that.
the 4.7L has hydraulic motor powered engine cooling fan
as you many not know the A/C condensor rams hot AIR
to the front of the engine RAD and cause it to overheat
so the engine fan is very much part of this regulation system.
The AC will also shut down for many AC related errors
and will do so if the engine or transmission over heats.
Self preservation.
there are 3 , 4.0L systems, for fan control
clutch fan or electric and one has a PWM modulated fan control module (its a transistor not relay in this case)

her is what chapter 7 states
PWM FAN CONTROL MODULE -
4.0L
DESCRIPTION
The pulse width modulated (PWM) radiator cooling
fan relay is located behind the front bumper fascia
below the right headlamp.
OPERATION
The PWM relay is used to control the speed of the
electric radiator cooling fan. It allows for multiple fan
speeds. This allows for improved fan noise and A/C
performance, better engine cooling, and additional
vehicle power.
PWM relay operation is controlled by the Powertrain
Control Module (PCM). To operate the PWM
relay, the PCM looks at inputs from:
† Engine coolant temperature
† Ambient temperature from the body controller
† Vehicle speed
† Transmission oil temperature
† A/C switch position (A/C request)

the SM does not list all rule and tests for this device.

more..?
here more quotes from your missing book
If an open or shorted condition has developed in
the relay circuit controlling the electric radiator fan
or fan control solenoid circuit controling the hydraulic
fan, a Diagnostic Trouble Code (DTC) can be set.
If the problem is sensed in a monitored circuit
often enough to indicated an actual problem, a DTC
is stored. The DTC will be stored in the PCM memory
for eventual display to the service technician.

fans stuck on quotes
1. Fan control sensors inoperative.
1. Check for DTC's. Verify sensor readings.
2. Fan control solenoid stuck 9on9. 2. Check fan operation speeds. Refer to fan
speed operation table.
3. Fan control solenoid harness
damaged.
3. Check for DTC 1499. Repair as required.
4. Transmission temperature too high.
4. Check for transmission over temp. DTC.
5. Engine coolant temperature too high.
5. (a) Check coolant level. Correct level as required.
(b) Thermostat stuck. Replace thermostat.
(c) Water pump failed. Replace water pump.
(d) Coolant flow restricted. Clean radiator.
(e) Air flow over radiator obstructed.Remove
obstruction.


the 4.7 liter engine the fan speed is base on above
and says, A/C system pressures.
the 4.7 then can can run at 500 rpm even when OFF. (SM)

now how to test the fan.
get engine hot, (drive 10miles say)
then park, and lest engine idle until the engine overheats
it will (but not in alaska, dig?)
and then the fans come on at bout 225f .. (about this is ball park)
electric fans
if using a 4.7L say so, its totally DIFFERENT

The AC cooling fan (in some cars) is tied to the operation of the AC only. Others are used as auxiliaries even when the AC isn't in use. Your normal fan is likely controlled by a thermal switch located in the bottom tank of the radiator and these are not uncommon failures, not terribly expensive or difficult to replace. It may be sloppy, but it is safe to leave the battery connected but the key removed when doing this; there won't be power to the connector if the engine is cool.
Check the lower radiator tank for a largish hex-headed sensor with one or two wires coming from it. It (or they) will be plugged into a mating connector. With a container to trap lost coolant (it can poison animals) and a tight cooling system, these switches can be removed and quickly replaced with little coolant escaping. Use Teflon tape on the threads of the new switch and do not over-tighten the switch when installing.

Ok this one is kind of hard to diagnose but maybe I can give you some answers. The 2 problems you have work hand in hand. If you have low oil level the heat in your cylinder walls raises because there is not enough oil to lubricate the fiction caused by the pistons going up and down. Secondly if your car overheats it gets so hot that the oil gets really thin thus viscosity break down occurs. Your Honda has an electric fan on the radiator and if this fan is not working your car will overheat. Crank your car with the hood up and let it idle till the temperature gauge comes up and the electric fan should come on. You will be able to hear and see this happen. If the temperature guage keeps climbing and the fan has not come on then turn your AC on and see if the fan comes on. They are tied together and when the AC is on the cooling fan switch is bypassed and runs all the time. You also have a oil pump in your engine that keeps the oil pressure moving inside the engine. If this is going out it will cause the oil light to come on and make your engine overheat. I am sure you have checked the oil level and the coolant level in your car but if you haven't please do that. I hope this helps you out to find your problem. Oh yea if the coolant fan comes on when the AC is turned on then you have a bad sensor and you need to replace that. In any case I would not drive it until you figure this out because it will for sure cause engine damage. Good luck, Roger

Typical problem of R-134 freon. It just doesn't perform well at idle, though hardware changes over the years have improved performance in later models.

However, be sure to cover the bases. Check freon charge with gauge set. Don't guess. Make sure the pressures are correct and that cooling fan is functional and nothing restricting air flow at condenser & radiator. High pressure from car wash wands can fold-over the cooling fins at radiator thus restricting air flow. I suspect all this is good but you should make certain to remove any doubt.

this is normal. The fans are thermostatic controled. When you park your car and the engine is not running and not circulating water the temp. will come up and the fans will come on and cool the water down. Make sure you check your water level in the radiator and expansion tank. AFTER the car has cooled down.