94 Honda Passport with no heat What do you need to get it working again?

1. Check the coolant level. If the coolant level is low, it will not be able to circulate properly and the heater will not be able to produce heat.

2. Check the thermostat. The thermostat is a valve that controls the flow of coolant to the heater core. If the thermostat is stuck closed, it will prevent coolant from flowing to the heater core and the heater will not be able to produce heat.

3. Check the heater control valve. The heater control valve is a valve that controls the flow of hot coolant to the heater core. If the heater control valve is stuck closed, it will prevent hot coolant from flowing to the heater core and the heater will not be able to produce heat.

4. Check the heater core. The heater core is a small radiator that is located in the passenger compartment of the vehicle. It is responsible for transferring heat from the coolant to the air that is circulated through the vehicle. If the heater core is clogged or damaged, it will not be able to transfer heat properly and the heater will not be able to produce heat.

5. Check the blower motor. The blower motor is responsible for circulating the air through the vehicle's heating and ventilation system. If the blower motor is not working properly, it will not be able to circulate the hot air from the heater core and the vehicle will not be able to stay warm.

6. Check the blend door. The blend door is a valve that controls the mix of hot and cold air that is circulated through the vehicle. If the blend door is not working properly, it will prevent hot air from flowing into the vehicle and the heater will not be able to produce heat.

7. Check the electrical system. The electrical system supplies power to the heater fan and the heater control valve. If there is a problem with the electrical system, the heater fan will not be able to operate and the heater control valve will not be able to open, preventing the flow of hot coolant to the heater core.