- Joined
- Sep 27, 2022
- Messages
- 550
- Reaction score
- 419
- Location
- Tennessee
- My Car
- Green on green 72 Mach 1
Trying to figure out how the heat works on a A/C equipped car.
I have basically a whole new system, new heater core, new heater A/C box, new water valve vacuum motor. I have the hose off the block with the valve on the heater core tube to the right and the valve is installed with the arrow pointing towards the firewall. The hose coming off the water pump on the heater core tube to the left like what I feel is correct.
Before I installed the water valve vacuum motor I noticed you have to have the diaphragm pulled in like it would be with vacuum applied to it for water to flow. Am I correct?
What is confusing is the water valve switch attached the the hear core box. Does it send vacuum to the water valve when the temp control arm is in the cold position ( pushing on the switch plunger) or in the warm position not pushing on the switch plunger?
With the car fully warmed up and idling and trying to get heat on in the car it seems like I have the temp set on cold and the heat A/C selector in fresh or A/C to get vacuum to the water valve.
Any insight would be greatly appreciated
Thanks
I have basically a whole new system, new heater core, new heater A/C box, new water valve vacuum motor. I have the hose off the block with the valve on the heater core tube to the right and the valve is installed with the arrow pointing towards the firewall. The hose coming off the water pump on the heater core tube to the left like what I feel is correct.
Before I installed the water valve vacuum motor I noticed you have to have the diaphragm pulled in like it would be with vacuum applied to it for water to flow. Am I correct?
What is confusing is the water valve switch attached the the hear core box. Does it send vacuum to the water valve when the temp control arm is in the cold position ( pushing on the switch plunger) or in the warm position not pushing on the switch plunger?
With the car fully warmed up and idling and trying to get heat on in the car it seems like I have the temp set on cold and the heat A/C selector in fresh or A/C to get vacuum to the water valve.
Any insight would be greatly appreciated
Thanks
Last edited: