I have checked fluid they are okay, I have replaced the thermostat still no heat. The hoses to the heater core has one warm to hot the other cold. Where do I find the heater control valve, its a 1999 Durango with a 5.2 engine
Had a friend with a simular problem, and as it turned out for him was he had climate control heating which means drivers side climate could be set at 72 degrees and passenger side set at 72 degrees or what ever desired temp, when selecting the temp for the passenger side it would always be cold,
as he found out when operating the heater controls the littles doors the direct the airflow were stripped out under the dash, he took it to a dealership and they were able to oder the peices to fix the pivots for the doors.
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The stock thermostat in these is 190 degrees, so 170 could indicate that the t-stat is starting to go south. However, that shouldn't cause no heat in the passenger compartment. Yes, it could be a clogged heater core, but more likely a problem with the blend door in the control box under the dash. Check, by feel, the heater hoses going into and out of the firewall with the engine warm. If both hoses are warm to the touch, then the heater core is probably ok.
I would take a closer look at the heater control valve located in line with heater core hose.it vacuum controlled to close coolant flow to heater core when a/c Is on.it's located by the radiator on passengers side.it has a black plastic lever on it, and the body it aluminum. The lever breaks internally, causing low coolant flow to heater core.remove and you will find white sludge build up. Replace and be on your way....
Thermostat.? if you haven't? Do it first then try it. While the car is running for a while touch the heater hoses that lead to the firewall. if one is cold and one is hot? You have a blocked Heater core. Follow the hoses back to the engine. Unconnect them both. By using a garden hose flush out the heater core do one side and then reverse by doing the other hose Lots of junk will come out so be care ful. Mistake people make is "Flushing the system" That doesn't mean your flushing the heater core. Seeing that you have done everything else it could be the thermostat which you didn't list or the heater core being clogged. When you finished installing the thermostat and flushing the heater core out. Replenish the coolant system . If you have a bleeder on the thermostat housing? use it . loosen it and top off the fluid until you see fluid comeout of the bleeder. The system being air bound would cause no heat..
good day, heater core/coil is leaking antifreeze and needs to be replaced. The heater core works in conjunction with your engine's cooling system. The function of the cooling system is to remove heat from the engine, and it does this for the most part by sending the heated anti-freeze to the radiator located in the front of the car. The position of the radiator allows outside air to blow across the radiator thus cooling the anti-freeze. The anti-freeze is then sent back to the engine. Hot anti-freeze is circulated throughout the cooling system by the radiator and heater hoses. Think of the heater core as a small radiator located inside the dashboard of your vehicle. hope this helps, have a nice day.
Hello, No! I'm assuming that the temp gauge is working in truck & you are not over heating. On the passenger side firewall check both hoses going to/from heater core. If both are not warm then it is probably a heating core plug. You will have to replace the heater core.
It sounds like the heater coil needs flushing out or replacing or the heater valve. Look on the engine firewall and make sure the heater valve is opening. If not open it manually and check the heat level. If that produced heat check the condition of the heater vale cable (or vaccum hose).