Heater issue

[Shannon Whitehead]

#130797

Sounds like a possible vacuum problem. There is usually a valve that is inline with one of the heater hoses. It opens when the temp settings are set to warm-hot. Valve is supposed to be closed when temp is set to cold. It maybe closing for some reason…….

[71firebird400]

#426006

Hot air is only routed to the defrost and footwell vents; cold air is only routed to the dash vents. You will never be able to get hot air out of the dash vents.

[Shannon Whitehead]

#426007

Check under the hood to determine whether or not the cable from the heat control is still connected to the water valve on the heater core. Cable ends in a small loop that fits over a tab on the water valve.

[Shannon Whitehead]

#15117

Hey guys, I know this isn’t Viper related or even cool vehicle related, but the generic dodge forum isn’t too helpful when it comes to troubleshooting so I was hoping you guys might be able ot help me (and this isn’t the alley, so I likely won’t get criticised too much for the vehicle. Anyway, here is the issue. I have a problem with the heating that just started a few days. When I am driving the van, and the heat is on, it will blow hot (from the defrost, lower leg parts, etc.) but after about 20-30 minutes it will blow cold. The first time it happened I thought that the heater core had gone, but next day the exact same thing happened. There is no antifreeze leak at the firewall, or anywhere else for that matter so I don’t think it is the heater core. I have done no work on the cooling system, so I don’t know where to start. The antifreeze level is good.

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