Is there a fuse or a relay that controls both the heat and the air in my 98' honda accord ?

SOURCE: 2001 honda accord, air conditioner is not working,

one fan is for the a/c it will cycle on when the a/c is turned on the other fan should be linked to the temperature sensor. check your fuses if you haven't already. then check your temp sensor. i'm not sure on a honda but most newer cars have multiple sensors so you will have to find out which on is for the fan. also you need to find out if the fan is controled by a pcm as some new model cars have almost everything controled through the powertrain control module

SOURCE: Compressor Magnetic Clutch - 1996 Honda Accord EX

looks like fuse # 8 "heater control relay- ac clutch relay-cooling fan" fuse runs the 12 volt side " black and yellow stripe wire " pcm or ecm runs the ground side "red -blue stripe wire"- what else do you need?

SOURCE: heating in my 95 honda accord

Here's my list! 1st-check coolant level, if it's low, u won't get heat. 2nd Is engine reaching operating temp within about 5 minutes or a little more? If it is running below the normal level, the thermostat may be stuck open, not allowing the car to reach operating temp, again, no heat. 3rd dash control not working to turn on heat. The heat control is vacuum operated, so if there is a leak or kink in the vac line, it won't work. (not too common). Many cars (I'll have to check on the 95 accord) have a heater control valve in the heater hose line under the hood near the firewall. Sometimes the valve just gets stuck in the closed position, so again, no heat as the hot coolant can't circulate into the heater core.4th plugged heater core. Corrosion, rust plugs up the heater core, coolant can't circulate, no heat.
Start w/ the easy cheap fixes, work your way down, let me know if u need more info. and how u make out.

SOURCE: 1997 honda accord overheating

well you should first hard wire the non working fan to the battery to see if it is ok, then I would check the engine coolant temperature sensor, it is the sensor that tells the computer to turn the radiator fan on

SOURCE: 1994 Honda Accord Dashboard Lights Diagram

Remove the dash and check the plug is connected.or maybe loose