My s-10 does the same thing. I have found out that it only blows when I place the blower motor in speed 4. If I unplug the blower motor and put the switch to 4 it does not blow. I have recently replaced the blower motor and resistor and this had no effect. Hope this helps.
The HVAC Blower Fuse (A/C FAN) is in the Driver's Side Instrument Panel Fuse Box. The HVAC Blower Relay (HVAC BLO) is in the Passenger's Side Instrument Panel Fuse Block. As seen on page 6-61 & page 6-64 of your "Owner's Manual"
There is a fuse in the fuse box, a relay in the relay center and a pump in the tank. fuse is under the hood on passenger side by hvac box it has a cap on it should be a 15 amp fuse
The best thing you can do is check the owner's manual. If you don't have it, it should be a fuse like HVAC, AC or something along those lines.
In a 1994 Chevy Cheyenne, the fuse that typically controls the heater is the "HVAC" or "Heater" fuse located in the fuse box under the dashboard. It's essential to check the owner's manual for the exact fuse designation and amperage, as configurations may vary slightly. If the heater is not functioning, inspecting this fuse for continuity is a good first step.
In a 2008 Chevy Cobalt, the fuse for the heater is located in the under-hood fuse box. Specifically, you should look for the fuse labeled "HVAC" or "Heater" in the fuse box diagram found on the cover of the box or in the owner's manual. If you're having issues with the heater, check this fuse first to see if it's blown and needs replacement.
If your thermostat is turned off but your HVAC system is still blowing air, it could be due to a malfunction in the system's wiring or controls. This can cause the fan to continue running even when the thermostat is set to off. It's recommended to have a professional HVAC technician inspect and repair the issue to ensure proper functioning of your system.
In a 2005 Chevy TrailBlazer, the fuse for the blower motor is located in the fuse box under the dashboard on the driver's side. Specifically, it is typically the 30-amp fuse labeled "HVAC" or "Blower." You can also find another related fuse in the under-hood fuse box. Always refer to the owner's manual for the exact location and specifications.
If the ecm doesn't see oil pressure after 2 seconds it will cut off power to the pumpBad fuel pump relay or blown fuse. ON SOME CHEVY VEHICLES THE OIL PRESSURE SWITCH HAS A DOUBLE RELAY BUILT INTO IT THAT IF IT IS BAD WILL ALSO FEED THE FUEL PUMP EVEN WITH THE IGNITION OFFAs well if the inertia switch was tripped that will also stop power to the fuel pump.Would this cause the HVAC #21 fuse in the inside of truck to keep blowing?
The symptoms of a blown HVAC fuse include the system not turning on, no air coming out of the vents, and the thermostat not responding.
Your HVAC system may not be blowing cold air due to a variety of reasons, such as a refrigerant leak, a dirty air filter, a malfunctioning compressor, or a problem with the thermostat. It is best to contact a professional HVAC technician to diagnose and fix the issue.
If the HVAC blower motor does not work on any speeds, I would suspect the motor or the switch is bad.
The fuse for the heater blower fan on a 2007 Chevy Cobalt is located in the under-hood fuse box. Specifically, it is labeled as "HVAC" or "Blower" and is typically a 40-amp fuse. You can find the under-hood fuse box near the battery, and the diagram on the cover will help you identify the correct fuse. Always ensure the vehicle is off and the keys are removed before checking or replacing fuses.