Digital display The digital display of the air flow, fan speed, and temperature for the heater and air conditioner does not light up. They all work but can't tell what they are set at...
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Try all fan speed settings to determine if you have air flow on any (particularly High speed). I don't know the specifics of your Echo, but typically high speed is a straight-through connection for power to the blower motor.
If high speed works but none of the slower speeds do, the issue is very likely the blower motor resistor or the resistor connector.
If none of the speeds work, there might be a bad fuse for the blower motor or the motor itself might be bad.
If you can hear the blower on all speeds but still no air is coming out the vents, the issue might be either a damaged diverter door that is not properly directing air flow or possibly something got sucked in to the blower motor squirrel cage and is severely restricting air flow.
-Rod
To cool off your Toyota after it has been parked in the hot sun, drive with the windows open for a few minutes. This vents the hot air, allowing the air conditioning to cool the interior more quickly.
Make sure the air intake grilles in front of the windshield are not blocked (by leaves or snow, for example).
On humid, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.
Keep the area under the front seats clear to allow air to circulate throughout the vehicle.
On cold days, set the fan speed to high for a minute to help clear the intake ducts of snow or moisture. This can reduce the amount of fogging on the windows.
When driving on dusty roads, close all windows. If dust thrown up b the vehicle is still drawn into the vehicle after closing the windows, it is recommended that the in intake be set to FRESH and the fan speed to any setting except "OFF".
If following another vehicle on a dusty road, or driving in windy and dusty conditions, it is recommended that the air intake be temporarily set to RECIRCULATE, which will close off the outside passage and prevent outside air and dust from entering the vehicle interior.
HEATING
For best results, set controls to; Fan speed ---- Any setting except "OFF" Temperature----Towards WARM (red zone) Air intake ---- FRESH (outside air) Air flow ---- FLOOR Air conditioning ---- OFF
For quick heating, select recirculated air for a few minutes. To keep the windows from fogging, select fresh after the vehicle has been warmed.
Press the "A/C" button on for dehumidified heating.
Choose floor/windshield air flow to heat the voltage interior while defrosting or defogging the windshield.
AIR CONDITIONING
For best results, set controls to;
Fan speed --- Any setting except 'OFF" Temperature --- Towards COLD (blue zone) Air intake --- (outside air) Air flow --- PANEL Air conditioning --- ON
For quick cooling, move the air intake selector to recirculate for a few minutes.
VENTILATION
For best results, set controls to;
Fan speed --- Any setting except 'OFF" Temperature --- Towards COLD (blue zone) Air intake --- (outside air) Air flow --- PANEL Air conditioning --- ON
DEFOGGING
The inside of the windshield
For best results, set controls to:
Fan speed --- Any setting except 'OFF" Temperature --- Towards WARM (red zone) to heat; COLD (blue zone) to cool Air intake --- FRESH (outside air) Air flow --- WINDSHIELD Air conditioning --- ON
The outside of the windshield
For best results, set controls to:
Fan speed --- Any setting except 'OFF" Temperature --- Towards WARM (red zone) Air intake --- FRESH (outside air) Air flow --- WINDSHIELD Air conditioning --- OFF
On humid days, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.
DEFROSTING
The outside of the windshield
For best results, set controls to:
Fan speed --- Any setting except 'OFF" Temperature --- Towards WARM (red zone) Air intake --- FRESH (outside air) Air flow --- WINDSHIELD Air conditioning --- OFF
To heat the vehicle interior while defrosting the windshield, choose floor/windshield air flow.
got full fan speed? on high>? sure.
got full engine coolant heat 180F or more holding??? if not all is lost.
if car has a heater core water valve is it open>?
are the 2 heater core water tubes both fully hot,(hand test)
yes> good.
now you need air flow through the core (heater)
that means the damper most be open,, is it?
the fSM covers the complex tests of dampers, and not having
a real FSM makes this near impossible.
why , because your dampers are no like anyothers on earth.
other cars use different types. and are all unique .
unlike CABLES
unlike vacuum servos.
see>?
indicates that the fan is not drawing air through the radiator at idle or low road speeds
If viscous fan hub --replace it
if electric fans check
coolant temp sensor
2 fuses , relay . fans . ECM
1st of all, you need to check your anti-freeze level. If its not full, the coolant cannot/will not flow throughout your heater core which the coolant flow through to heat your vehicle. If it is indeed up to the proper level? Than, yes I would look into the thremostat. It may not be opening up.
?? I also have 2004 XK8 with the navigation screen (Alpine). That isn't a touch type screen. The newer ones have a touch screen, but not that year. You set the temperature (digital display) and the car will either turn on the heat or air conditioning, and speed up or slow down the fan depending on how close the actual temperature is to what you have set.
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