99 EX Coupe - No Heat
#1
99 EX Coupe - No Heat
The heat quit working in my Accord yesterday. It had been working without any issues until then. I checked that the control valve in the engine compartment is moving, and that both actuators are working in the passenger compartment. The airflow does change, when I push the buttons on the control panel (defrost, upper, lower, both). The fan works fine. The thermostat is good. What else should I be checking? Thanks
#7
Yes, the valve in the engine compartment opens and closes when the temperature dial is turned while the ignition is on. The lever on the valve doesn't seem like it's loose at all, either.
#8
With the car running at operating temperature what where is your temp gauges at. What is the temp on the hose going to the heater core? Only if you have verified your thermo is not stuck open then it's either you climate control, air in system, or blend door actuator on the passenger side.
Troubleshoot the actuator first. Remove it from its location then plug it back in and operate the heater with the car on. If it moves then it's working if not then replace it. If your heat was working last year and you had no leak or didnt do a coolant change then I wouldn't worry about air in the system. Now it points to the control unit.
Troubleshoot the actuator first. Remove it from its location then plug it back in and operate the heater with the car on. If it moves then it's working if not then replace it. If your heat was working last year and you had no leak or didnt do a coolant change then I wouldn't worry about air in the system. Now it points to the control unit.
#10
With the car running at operating temperature what where is your temp gauges at. What is the temp on the hose going to the heater core? Only if you have verified your thermo is not stuck open then it's either you climate control, air in system, or blend door actuator on the passenger side.
Troubleshoot the actuator first. Remove it from its location then plug it back in and operate the heater with the car on. If it moves then it's working if not then replace it. If your heat was working last year and you had no leak or didnt do a coolant change then I wouldn't worry about air in the system. Now it points to the control unit.
Troubleshoot the actuator first. Remove it from its location then plug it back in and operate the heater with the car on. If it moves then it's working if not then replace it. If your heat was working last year and you had no leak or didnt do a coolant change then I wouldn't worry about air in the system. Now it points to the control unit.