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"
A 30 amp HVAC fuse can blow due to various reasons such as a short circuit, an overload condition, or a malfunctioning component within the HVAC system, such as a compressor or fan motor. Additionally, damaged wiring or connections can cause excessive current draw, leading to a blown fuse. Regular maintenance and inspection can help identify and resolve potential issues before they cause fuse failure.
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.
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?
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.
In a 2006 Chevy Trailblazer, the heater fuse is located in the underhood fuse box. You can find this fuse box near the battery, and the specific fuse for the heater is typically labeled as "HVAC" or "Heater." To access it, open the fuse box cover and refer to the diagram on the inside for the exact location and amperage of the heater fuse. Always ensure the vehicle is off before checking or replacing any fuses.
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.