I have a 2001 Chevy S-10 Pickup, and the heat and AC have always worked fine, and I have recently discovered that when I turn on the heat it only blows out cool air. This does not matter how long the truck has been running, either. The AC still works fine, any suggestions?
2006-09-19 02:47:16 · 8 answers · asked by Scottsdayle Warrior 1 in Cars & Transportation ➔ Maintenance & Repairs
SEVERAL POSSIBILITIES HERE
START WITH THE EASIEST FIRST
CHECK THE COOLANT LEVEL FIRST
IF IT IS LOW YOU MAY NOT GET FLOW TO THE HEATER CORE
IF THIS IS OK TURN THE HEATER ON AND FOLLOW THE HEATER HOSES TO THE FIREWALL WHERE THEY MEET THE HEATER CORE
CHECK TO SEE IF BOTH HOSES GET HOT
ONE GOING IN WILL BE HOT . ONE COMING OUT WILL BE ALSO IF THE HEATER CORE IS NOT PLUGGED
IF THE "OUT" HOSE IS NOT HOT CHECK THE HEATER CONTROL VALVE WHICH WILL BE ATTACHED TO THE HEATER HOSES JUST BEFORE THE HEATER CORE
SEE THAT ALL VACUUM LIKES ARE ATTACHED AND THAT THE VALVE WORKS.
YOU MAY CHECK THE HOSE FOR VACUUM
THE VALVE MAY BE STUCK
IF THERE IS NO VACUUM THERE THEN I WOULD GO NEXT TO THE DASH CONTROLS
REMEMBER, IF YOUR THERMOSTAT IS STUCK CLOSED YOU OVERHEAT STUCK OPEN YOU MAY NOT HEAT WELL BUT SHOULD HAVE HEAT AFTER DRIVING AWHILE
2006-09-19 03:05:26 · answer #1 · answered by John K 5 · 0⤊ 1⤋
The first thing to check is the coolant level in the vehicle. Low coolant will cause the problem you describe. If the coolant level is good, feel the heater hoses when the engine is at normal operating temperature, and the heat is on. If one is cool and one is warm, you either have a bad heater control valve, or a clogged heater core.
Make sure that the engine is getting to normal operating temperature, a bad (open) thermostat will cause the same problem!!
2006-09-19 09:54:13 · answer #2 · answered by fire4511 7 · 0⤊ 0⤋
The cable that controls the hot water flow to the heater core may have broken or come loose. Check the water/coolant level in your radiator. If it's low, your heater won't work. If your heater core is damaged, your cooling system will leak while the heater in on, so try turning on the heater with the truck running and watch for leaks inside and outside.
2006-09-19 09:57:34 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Hi...I do not know what ambient temperature it is in your region. So if you are in a cold region (-10 ºC to+10 ºC) you must check your thermostatic valve(Surely it is stuck open and engine does not reach operating temperature ). In fact, your problem is located in the circulation of water form engine to truck cabinet.
So first of all you must check if your engine is reaching the operating temperature. if operating temperature is reached, therefore the problem is in the control valve that allows you to select heat/cold on dash board.(Stuck valve or broken mechanism/cable).
Now I will also suggest that you check your air conditioner too...Could be your compressor is stuck engaged(Mechanically/Electrically---to check the switch on dash board---also the compressor) and that when you select hot, it is mixed up with cold air and you do not get the heat required in the truck....stuck compressors will also slightly reduce the engine performance and increase fuel consumption...
2006-09-19 10:19:27 · answer #4 · answered by Maintech 1 · 0⤊ 0⤋
check your thermostat it sounds like it is stuck open on it,this is the most common cause for it to loose heat like that,i own a repair shop,and its starting to get busy this time of year because everyone wants to make sure they have good heat ,,and thermostats go bad and should be replaced at least once a year,id also change the anti freeze in it while i was doing it,,good luck with it,i hope this help,s.
2006-09-19 10:05:02 · answer #5 · answered by dodge man 7 · 0⤊ 0⤋
Sounds like your heater core. $$$$$.
2006-09-19 09:49:04 · answer #6 · answered by Joe S 3 · 0⤊ 0⤋
try replacing the thermostat it might be stuck
2006-09-19 09:56:16 · answer #7 · answered by Joanne B 1 · 0⤊ 0⤋
build in a fireplace
2006-09-19 09:54:21 · answer #8 · answered by Anon 2 · 0⤊ 1⤋