if antifreez is blowing into cab, u need to replace the heater core the core has a hole in it. thses are not repairable and they are cheap to buy
The heater isn't an extra unit, it is simply pulling heat from the engine and blowing it into the cab. If the engine is not hot the heat will seem like it is not working. If the heat is not working after the engine has warmed up, you may have a fan that doesn't work, or a clogged vent.
the engine will never fully warm up, and will not produce heat to the cab area for very long during cold weather
A cab over engine truck is a truck where the driver's cab is on top of the engine. When the engine needs to be repaired, guess what happens? The whole cab tips forward to give the mechanic a look.
could be a vacuum leak
The cab sites over the engine, as opposed to a conventional/Arctic, where there is a hood, and the engine sits in front of the cab.
no heat can be caused by,blocked heater core insufficient coolant in engine blocked heater hoses from engine to heater core bad heater thermostat bad thermostat in engine bad heater control switch
The one in the engine compartment, moves air thru the radiator to cool the engine. The one in the cab, moves air to either heat or cool the compartment.
Sounds like the thermostat is stuck. It is supposed to open when the engine heats up to keep the engine cool. The same antifreeze fluid is used to heat the inside of the car. If the thermostat is stuck in the closed position, the fluid cannot flow through the engine (thus cooling it) and through the heat exchanger to heat the passenger cab. Sounds like the thermostat is stuck. It is supposed to open when the engine heats up to keep the engine cool. The same antifreeze fluid is used to heat the inside of the car. If the thermostat is stuck in the closed position, the fluid cannot flow through the engine (thus cooling it) and through the heat exchanger to heat the passenger cab. Sound like a coolant leak.
Car heating systems usually rely on the excess heat generated by the engine to heat the passenger compartment. There's a thing that looks just like a small radiator that sits in a fan shroud underneath the dash. When the engine has gotten warm, the coolant liquid that circulates through the engine and this little radiator also gets warm. And by having a fan blow air through the radiator, you get warm air that can be directed out through the vents in the dash into the passenger compartment of the car. There's a lot of metal in the engine that needs to heat up before the coolant is warm enough to heat the radiator enough for it to heat the air that you can send out into the cab.
Faulty blend door control, clogged cab filter, weak HVAC blower, obstruction in the HVAC ducts.
The firewall on any car is the wall between the engine and the cab. It protects the driver and passengers from heat off of the engine and in case something goes wrong with your engine. Most parts won't be able to break through the firewall.