The heater on my astro van doesnt work i had someone check it and the fuses are ok and the heater core is ok too. what is the problem i cant take my kids anywhere with me cause it is too cold please help this mother of 5 thank you
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Feel your heater hoses. If both are hot, the core is circulating. If only one is hot-poor or no circulation of the core. If the heater core is circulating, the temperature blend door may not be working to let blower air pass across the heater core, and into the vents. If vacuum operated, watch the vacuum valves as you move heater controls-you may spot the problem. Check that the vacuum line from the engine to the control switch is working and still connected. If not operated by vacuum, the controls may have cables to the heater case or may be electrically operated. You'll just have to scope it out. Good luck.
Have you checked the coolant level? If it is low on coolant, none will circulate through your heater core. Check your reservoir and your radiator (when cold only). If that isn't the problem, check the hoses to the heater core to see if one is hotter than the other. They should both be at least warm, but the inlet hose should be slightly warmer. This is all assuming that your thermostat is good and your van actually gets warm when you're driving it. In the situation your coolant is low, fill it. In the situation your heater core is clogged up, it needs to be replaced. Obviously you'd rather just have to fill the coolant.
Another issue could be in your interior controls and duct work. My Astro doesn't blow on the heater setting at all on the driver's side. Electronics and electrical problems annoy me so I don't bother to fix it. There should be a duct that opens and closes to let in either cool or warm air, or a mixture of both. If that's your problem, I can't offer a solution besides a small heater you can plug in the cigarette lighter.
Could be a bad heater core, any fluid leaking around it...check under the carpet and padding if you don't see anything under it on the ground. Your coolant may also be low, and it isn't circulating to the heater core, or a vacuum line may be off the hot/cold gate on the heater box, there are a lot of possible causes, but i would check for leaks and fluid level first
SOUNDS AS THOUGH THE HEATER CORE IS PLUGGED. TRY BACK FLUSHING IT AGAIN. IF YOU STILL GET NO FLOW IT IS MORE THAN LIKELY PLUGGED AND WILL NEED TO BE REPLACED. THE TUBES ARE VERY SMALL AND PLUG EASILY WITH RUST.