A restricted/plugged heater core can do that. Try flushing the heater core.
The light in the switch can not be changed, the whole switch would need to be replaced.
heater switch needs replaced
Fuse- Blower Motor- Wiring- Selector switch fail- i8f you still have heat to the heater core, if the heater core is cold, and the mottr is still hot... change the thermostat
If your heater core wasn't leaking at the time your radiator was replaced , then ( no ) That would be two separate jobs
Not knowing what year, make and model you have, I would suspect the heater fan switch and or electrical plug to the switch is at fault.
Early Previas, prior to 1994, were notorious for overheating the heater switch and melting the plastic casing. Once melted, the plastic would interfere with the switch lever movement and would glue itself in the last positon set. Forcing the switch, may restore some of the blower speed positions, but usually just open circuits and must be replaced for a very high cost of labor.
i would check if you have power to the motor from the switch
Answer NO NO NO ITS YOUR STALK SWITCH ALL YOU DO IS SPRAY SWITCH CLEANER JOB DONE NO MORE CLICKSI thin the switch is also the relay that's why it clicks
there seems to be a short in the electrical system, i would start by checking the heater switch,
== == The heater fan is electrically driven, so the fault will be either a loose wire connection, or the heater fan switch needs to be replaced. Have a licensed mechanic test the wiring and the switch function to find the fault and then repair it.
I also own a 97 Ram 1500. Recently my headlights would go out when I tilted the steering wheel into the down position. I replaced the multi-switch (wipers, brights, turn signal) and the problem was solved.
There are a couple of reasons why a 1999 Oldsmobile Alero ac heater to stop working. The heater coil may need to be replaced or the HVAC blower motor may need to be replaced.