Most times I have seen either a bad switch or broken vacum lines. you might want to make sure that none of the line got mixed up if they were removed at some time.
Where is heater control switch
First check your fuses. Next check your fan to see if it is working and if the wires are hooked up. The fan is located in the engine compartment on the passenger side. If the fan tests good it is your heater relay located on the heater core cover or the fan switch on the heater control. The heater control is in the passenger compartment. The fan switch will usually work on at least one setting.
If you are talking about a wall switch for the heater, check to see if the heater has its own internal thermostat or switch as this might be in the off position and not allow the heater to turn on. If you are talking about a switch on the heater itself, then yes in all probability the switch is not working.
Remove the heater control switch decorative cover. Remove the retaining screws. Remove the wiring harness. Reverse the process to install the new switch.
The 1992 Acura heater control relay switch can be found beneath the passenger side dashboard. The heater control relay switch will be a few inches above the kick plate.
It could be the high speed heater motor relay is stuck on or the switch itself is broken.
Check the fuse
It is either the fuse or relay. also check the heater/ ac control switch.
It adjusts the heat in the car so you can control your AC and heat to the temperature you like.
To change the heater control switch in a 2006 KIA Rio, first, disconnect the negative battery cable to ensure safety. Remove the dashboard trim panel around the heater controls using a trim removal tool, and then unscrew the screws securing the heater control assembly. Disconnect the wiring harness from the back of the switch and replace it with the new switch, reassembling everything in reverse order. Finally, reconnect the battery and test the new switch to ensure it functions properly.
Check for bad relay. Comtacts in relay not opening......Kem H.
To repair the heater control switch on a Mazda B2200 pickup, first disconnect the battery to ensure safety. Remove the dashboard cover to access the heater control assembly, then carefully detach the switch from its housing. Inspect the switch for any signs of damage or wear, and if necessary, replace it with a new part. Reassemble the components, reconnect the battery, and test the switch to ensure it's functioning properly.