I had a very good mechanic that I work with put his computer on my truck to diagnose it. You can see it when you lower the glove box all the way down. Disconnect electronic blend door actuator control switch 63-pin harness connector C220. I usually try to hook my hose up to hot water to help break any gunk loose. Your car's blower circulates air across the cold evaporator and into the interior. I turned on the heat one day on my way to work and had now heat, just cool air. Rangers are notorious for having really hot scalding heat.
Logic would tell you that a faulty water pump would cause overheating problems but that wasn't the case on my truck. Here is a guide for a general heater not working problems. If there's a bad enough leak, the system will have no pressure in it at all. If air temperature does not change, go to next step. I was able to fix it this past weekend. Open the hood and follow the thinner of the hot water hoses, two of them should go into the firewall. Only cold air is blown through the top vents at that point.
It is the heat resistor fan speed control switch. If the hoses are too hot to handle then go to step 3. Could I possibly have a weak water pump or is there another problem?? Go through the list and Click the link below:---- 2000 Toyota Avalon: No heat on Passenger Side? Sometimes that causes the actuator to break. Inspect the water pump, hose connections, radiator and engine for coolant leaks. I took the time to pull the blend door motor off just to see if it was broke. If it isn't too hot to handle, check out the heater core. I assume your engine is warmed up properly could this be the issue in my 94 with no heat? The vent and heat are lukewarm to lukecool at best.
With electronic heater control valves, check for voltage at the valve. Okay, so my heat is not working. The other recepticle is under the car midway on the drivers side. Pulled out fuse 27 and it was burnt on one end but not broken. Does blow cold when driving around town at low speeds or even just sitting there. The air system really hasn't changed since 95.
Low coolant level usually the result of overheating or a coolant leak. If switch resistance is as specified, go to next step. My Ranger is an 07 Sport Regular Cab 2wd, 3. And sure enough, they say it was designed that way. February 11, 2005 The rear unit on the Econoline vans is odd. If the problem isn't due to a slipping drive belt, the pump probably has an eroded or separated impeller. Blend door and the blend door actuator are located on the heater case plenum.
Heat works correctly in the front, just not in the back. Nov 28, 2012 To troubleshoot this types of problem,click the link below :--- Car heater blowing warm, but not hot air? I had the same problem and thankfully it was just the control valve. I have a 2009 Ford Ranger 2. When the temp knob is placed in the 'warm' or 'red' position, and the blend knob is in the 'floor only' position like the manual says to test, there is only cool air, no heat whatsoever. No heat seems to come out of the upper rear vents.
Be sure to install a thermostat that is rated at the same temperature as the original usually 195 degrees on late-model cars. There is no change when the knob is turned to max cold blue or max heat red. If your heat doesn't work on the older Rangers, check all the linkages. When we unplugged it the fan turned off. Thanks for the help Ok guys, turned out the motor mounted oil cooler was plugged up not allowing the antifreeze from the heater core to circulate. I did it and allowed moisture to get in my system and slightly overfilled as well.
Have all fluids supposedly topped off on last 2 oil changes. . In the manual it says it is for the fuel pump but cleaned the contacts and replaced it, removed and tapped on the fan relay's 5, 40 and 86 I believe and after running the truck for a few minutes the fan has not kicked in. If resistance is 5 ohms or more on any wire, repair appropriate wire s. There isn't much room in there, if you have small hands like me, this shouldn't be a problem, if not, I would suggest finding someone with small hands to do this project. I will take pics of my progress and post them so everyone can see how this is done. The 12 volt Defroster that are sold are about 12 Watts and don't do anything, don't waste your money.
In the condenser, this added heat and the heat the refrigerant picked up in the evaporator is expelled to the air flowing across it from outside the car. With cable-operated control valves, check the cable for sticking, slipping loose mounting bracket or misadjustment. If the system cools, but not much, it could just be low pressure, and you can top up the refrigerant. Best Answer I have a 1998 ford ranger that had the same problem. I have already replaced the blower motor resistor on a recommendation of an auto parts store employee. The water pump seals were good and the shaft bearings were good so there was no indication of a problem with the water pump.
Best Answer It sounds like your heater core is clogged. Best Answer I believe your water pump blade may be eaten all away. I had read in a blog that can be the problem. It dried up the moisture and defrosted my windshield just fine. Adding sealer to the cooling system may provide a temporary fix, but the long-term cure is to replace the heater core.