Best Answer

Is the coolant full? Sounds like the heater core is plugged up try flushing your cooling system this may help if not the heater core will need replaced. Or there could be a problem with the heat select switch or vacuum lines under the dash that control the heater door. COULD BE THE BLEND DOOR ACTUATOR. OR BLEND DOOR INOP. OR TEMPSELECT SWITCH Many of Ford�s manual air conditioning systems use an electronic blend door actuator (motor) to control the temperature of the air entering the passenger compartment. The temperature knob on the A/C�Heater control panel is a variable resister (potentiometer) which varies a voltage signal to the motor. This signal determines blend door movement. Complaints of temperature always hot, cold or not changing as the temperature knob is rotated will be caused by one of four problems: 1) bad actuator; 2) bad potentiometer; 3) open or shorted wire(s); 4) broken door. See this site for troubleshooting procedures\'s_Blend_Door_Actuator_02.pdf I had the same problem with my 1998 Ford Ranger and the accumulator hose was disconnected. Replace the hose and it is functional once again.

User Avatar

Wiki User

โˆ™ 2008-10-16 03:45:48
This answer is:
User Avatar

Add your answer:

Earn +5 pts
Q: What could be the problem on a 1998 Ford Ranger if you have replaced the thermostat and checked it to assure proper installation and both heater hoses to the core are hot but no hot air is coming from any vent?
Write your answer...

Related Questions

1994 Chevrolet cavalier changed heater core and thermostat what next no heat?

im having the same problem with my 1994 I've replaced the heater core,thermostat,radiator,i checked the coolant, and it's not over heating or nothing and still no heat lol

1995 Chevy cavalier z24. replaced water pump thermostat and still over heats coolant in resivoir does not boil. overheats underload?

had the same problem with a sibring,took to the garage,they replaced the thermostat and gasket and found a hairline crack in the thermostat housing they replaced the housing and everything was fine then

Why does your coolant light in your 2000 Chevy pickup keep coming on even after you have had it checked and there was no problem?

The sensor may be defective/broken. I would have that checked or replaced.

Replaced three thermastatschev cavalier?

either you are not using correct thermostats,or putting them in upside down,or thermostat is NOT the problem

Your Mazda MPV 1993 6cyl is overheating you replaced the thermostat and it is still overheating What can be causing the problem?

are the cooling fans coming on

How do you know if your car needs a new thermostat?

If your radiator isnt leaking and car is having a over heating problem and coolant spewing out. Chances are your thermostat needs replaced. possible the radiator needs to be flushed. But more likley its thermostat

I had the thermostat radiator cap and radiator replaced on a 2001 Mitsubishi galant and it still overheats sitting at idle and while driving Any ideas on what the problem is?

have the engine timing checked. if the timing is wrong the engine will overheat, are you loosing coolant?is the fan working, is the water pump working?

Your 1992 areostar heater gage varies what would cause this the heat varies with the gauge you replaced the thermostat because it was doing this but it did not help?

I've had the same problem before and after a new thermostat, but have never had a problem with over heating. I have a feeling the gauge is very sensitive.

When you apply the brakes hard the vehicle has a pull which is accompanied by a vibration?

If the car vibrates when the brakes are applied, it could be a sign that the brakes or rotors need to be checked or replaced. When a problem like this occurs, it is best to get it checked out as soon as possible to avoid worsening the problem.

2000 Honda crv had cooling system ckd out and everything is fine but my temp gauge shoots up and stays on high within a few minutes of driving replaced thermostat and sensors?

ask your service station to do a compression test. I had the same problem and replaced all sensors and thermostat but after the test it was found out that there was a crack in the housing holding the thermostat

What could cause a 1995 mercury villager to over heat Once the thermostat is replaced?

Did you put the thermostat in backwards? I would check to see where the steam is coming from. I had to change out small hoses for the same problem with mine.

2004 Trailblazer. Checked the code and the problem was the engine coolant temp sensor just replaced the part and engine light came on again checked the code and said it was the same part any help?

Could be a problem with the wiring from the computer to the sensor.

Why is oil and antifreeze mix after head gasket was replaced?

is it just residue from where the gasket is gone?, if not there is a possibility that the head is cracked, was the head checked to make sure it was not warped? and pressure tested?, also you might have an additional problem, radiator blockage,thermostat stuck or if its the k series the dreaded ballbearing problem, each of these could cause the gasket to go again

What would be the problem if a 1995 Grand Prix is running hot but you have put in a new water pump and thermostat?

Perhaps plugged radiator - have it boiled out or replaced

Your 2000 nisaan frontier overheats with a new thermostat when you use your ac?

check your radiator. is it clean or does it need to be replaced? a simple cleaning cured my problem.

If you have replaced a broken radiator and thermostat on your car and it is still overheating what could be the problem?

Inoperative radiator fans, bad water pump, failed headgasket?

94 BMW 325i overheats and heater blows cold air replaced thermostat water pump and flushed system what's the problem?

My guess is the head gasket, have same problem. Nightmare

Why would the radiator fan continue to run after the engine stops after the thermostat was replaced on a 2002 Nissan Altima?

Ingeneral, the fan will run only if the temperature of the radiator is above the normal range. If the fan is running, then the radiator must be over temp unless the radiator fan thermostat or it's relay is defective. If the radiator truly is over temp then you have a larger over-heating problem You state the thermostat was replaced. if you replaced the fan thermostat then either the radiator really is over temp and it is doing what it should, or there is a problem with the thermostat-fan relay or switch. If you replaced the engine thermostat that controls the flow of coolent between the engine and the radiator, then that probably wasn't your problem and you should look elsewhere for an overheating cause. I would start by determining if the engine actually is overheating or not. If it is, I would look for coolent system problems like the engine thermostat (if you didn't replace it already), water pump, leaks, scale build up in the radiator, or blockages in the system. If the engine isn't overheating then I would consentrate on the fan, fan thermostat and relays.

If you replaced the thermostat in your 95 3.8L Windstar and it is still overheating what is wrong?

Could be the head gasket. Very common problem with this engine and model year Windstar.

Why would a 98 GMC Jimmy have little or no heat even after the thermostat was replaced?

I had the same problem with my 98 jimmy I repalaced the water pump have had heat since.

Why would the coolant not circlulate even after you have replaced the water pump and the thermostat twice bled the system and checked for blockage?

Thermostat possibly installed upside down. Also a possible clogged radiator. we have had the same problems. replaced water pump thermo 3 times flushed sys twice repaired radiator,replaced hoses even left thermo out and still overheating help me too PLEASE!!!!! If you replaced the head gasket, it may not be installed in properly. I.E. coolant passages blocked by gasket. Could be air locked. I had this problem with a 1995 Grand Am. Get yourself a repair manual and follow the entire procedure to bleed all air in the cooling system. Some vehicles have a bleeder valve between the water pump and thermostat housing.

You replaced the thermostat in your 2001 Chevy venture but the van is still overheating the top radiator hose is hard and hot to the touch like the thermostat is not opening up please advise?

The top radiator hose is above the thermostat. If the top radiator hose is hot, the thermostat is opening. The thermostat is not the problem. Perhaps the radiator is clogged up or the water pump is bad. Look elsewhere.

How do you tell if your home thermostat needs to be replaced?

it should be replaced when it stops doing its job controlling the temperature and replacing the battery does not solve the problem or it is showing a digital error code that tells you it is defective. You may also want to test if it actually is doing its job but the heating or cooling unit may be broken. If you have more than one zone and you know what you are doing, you can switch it with a known working thermostat and see if the problem stays with the zone or it moves with the thermostat. That should tell you if the thermostat is broken or the system related to that zone needs maintenance.

What could be causing your 200 BMW 528i to overheat?

There are a few things that could be causing your 200 BMW 528i to overheat. You may not have the correct mixture of coolant in the vehicle. The problem could also be your thermostat. Have the thermostat checked out to ensure that it is working as it should.

How can you tell if thermostat on 95 ford escort bad?

If the engine is taking a long time to warm up or the gauge registers low heat the thermostat probably is stuck open and needs to be replaced. If the engine runs hot check the temperature of the upper radiator hose. If it's not hot the thermostat is stuck closed and should be replaced. If the upper hose is hot it means the thermostat is open and working. Cooling problem could be restricted radiator.