Why is the heat not working in my Pontiac Montana?
If there is no power at the connector, the blower motor resister is bad. If there is power, the blower motor is bad. If the fan works OK but some or all positions of the level control do not work and the air cannot be controlled, one or more doors are not functioning properly. If one of the doors does not open, there will be no heat.
Where is the blower motor on a Pontiac Montana?
Remove the bottom of the dash on the passenger side to gain access to the blower motor. The blower motor resister is right next to the blower motor, just to the left side and toward the rear. Pull the electrical connector off and turn on the ignition key. Turn on the fan for the blower motor. Check the connector for power on one of the terminals.
Where does the antifreeze go in a Pontiac Montana?
The hot antifreeze is picked up at the water pump and travels through a hose to the heater core. The hot antifreeze travels through the heater core and out the other side and sent back to the thermostat by another hose. The heater blower and the heater core, along with the air conditioning evaporator, are all encased in a housing under the dash.
Where is the fan resister on a Pontiac Montana?
The blower motor resister is right next to the blower motor, just to the left side and toward the rear. Pull the electrical connector off and turn on the ignition key. Turn on the fan for the blower motor. Check the connector for power on one of the terminals.
Why is my fan not working in my Pontiac Montana?
Whether the fan speed is in automatic or manual, the speeds are achieved by the use of a blower motor resister in close proximity to the blower motor. The most common problem is that the blower motor will not work or will work only on one speed.
Remove the bottom of the dash on the passenger side to gain access to the blower motor. The blower motor resister is right next to the blower motor, just to the left side and toward the rear. Pull the electrical connector off and turn on the ignition key. Turn on the fan for the blower motor. Check the connector for power on one of the terminals.
The blower motor resister is right next to the blower motor, just to the left side and toward the rear. Pull the electrical connector off and turn on the ignition key. Turn on the fan for the blower motor. Check the connector for power on one of the terminals.
How to troubleshoot the heating system in a Pontiac Montana?
Check the fuse and the relay first. They are located in the fuse block in the driver’s side compartment. Check the fuse for power and make sure it is good. If the fuse is good, check the relay by turning the ignition key and pulling the relay out of its socket. Check to make sure there is power to two of the terminals in the relay receptacle.
What to do if there is no heat in your car?
If one of the doors does not open, there will be no heat. Remove the glove box to gain access to the heater and AC housing. Start the engine and turn on the heat and set the fan on high. Rotate the knob to regulate the position of the air exchange while watching the motors on the housing.
Why does my Pontiac Montana only blow warm air?
Our 2003 Pontiac Montana will only blow warm air from the heater when the vehicle is moving. Vehicle blows only cold air when stopped. The higher the speed, the warmer the air temp. Can feel the temp cool as you slow and stop.
Is there a heater on my 99 Montana?
On my sons 99 montana, no heat control. a/c, air flow, etc. works great but no heat… any suggestions would be greatly appreciated. daughter in-law and 4 grand kids are gonna freeze to death this winter. Our 2003 Pontiac Montana will only blow warm air from the heater when the vehicle is moving. Vehicle blows only cold air when stopped.
How does the heating system in a Pontiac Montana work?
In order to troubleshoot the heating system in a Pontiac Montana, it’s important to understand how the heating system works in this vehicle. The hot antifreeze is picked up at the water pump and travels through a hose to the heater core.
If there is no power at the connector, the blower motor resister is bad. If there is power, the blower motor is bad. If the fan works OK but some or all positions of the level control do not work and the air cannot be controlled, one or more doors are not functioning properly. If one of the doors does not open, there will be no heat.
Where is the circuit tester in a Pontiac Montana?
The most common problem is that the blower motor will not work or will work only on one speed. To diagnoses this problem, a common circuit tester is necessary. Check the fuse and the relay first. They are located in the fuse block in the driver’s side compartment.
The hot antifreeze is picked up at the water pump and travels through a hose to the heater core. The hot antifreeze travels through the heater core and out the other side and sent back to the thermostat by another hose. The heater blower and the heater core, along with the air conditioning evaporator, are all encased in a housing under the dash.