Honda - Accord :: 1999 V6 Overheating - Fans Will Not Run Unless AC Is On
Feb 9, 2014
My 1999 Accord V6 with 180k miles has started overheating. The fans will not run unless the A/C is on. I replaced the coolant temp switch A, because the fan came on when I jumpered the pins of the fan connector. The fan will not come on, even when the temp gauge goes all the way to the top. Jumper the pins or turn on the climate control, the fans kick on, and the temp drops. Tested the old temp switch in boiling water and it tested fine. Tried spreading the pins on the temp sensor in case the connection was just bad and that did nothing.
Otherwise, the system seems to work fine. Top coolant hose gets hot first, then bottom gets hot after 10 minutes. The heat works, and I didn't see any signs of exterior leaks. What else might keep the cooling fans from coming on?
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My car is a 99 honda accord v6 EX (coupe)It started overheating about 2-3months ago. I was driving along and the needle on the gauge was completely on hot. I was able to make it home. Ive basically been driving it this whole time with the defrost on 80 and on full blast. Which keeps it around the halfway mark between hot and cold. I had a friend change my thermostat .. didn't fix it. Still overheats. But after he did that it seems to get hotter faster now. When I am at a stoplight it gets as hot as the gauge will let it go, then when I start driving again it cools down a little.
Now, after he changed the thermostat the car has been driving really rough. When I slow down to stop, it'll jerk a couple lightly then stop. When I accelerate from a stopped position it'll jerk a little then go. And when it shifts gears(its an automatic) it jerks very noticeably. So now im freaking out worrying my transmission is going too. So I guess what I am wanting to know is ... wtf is wrong with it??? Water pump? Ive been told if I change the water pump I need to have them change the timing belt too .. yes?
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My 1994 honda accord station wagons cooling fan is working but the temp gauge still goes all the way up then back to normal numerous times while driving.. I park on the side of the road while the car is on, pop the hood to check and see any signs of over heating but the motor seems to be normal.. What could be happening??
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So my friend, ignoring my advice that this generation seems to be riddled with electrical problems, decided to purchase a seemingly nice 99 Jetta, with a junkyard AEG swapped in(AEG is written on the intake and block like a JY would do). Sun roof doesn't slide back, gets jammed, evidence shows water has built up previously and run down the A-Pillar to the fuse box.
I just got the fans unplugged and verified that the fans with power applied, both have their low/high speeds. The fuses on top of the battery are in-tact, no visible melting, looks like the thing is in ok shape(haven't taken them off to inspect the contacts yet).
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I have been having a problem with my Honda overheating while the A/C is on, this is the thing though on any day when the weather is 85 or lower I can run my A/c all day no problem. But when it is 90 degrees out side my engine starts to over heat while the A/C is on, how ever as soon as I turn the A/c off temperature needle goes back down even in 90 degree weather.....
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Well, I was sitting in the drive-thru today and my car started overheating. On the way home the oil light started flickering, so I put in some oil I had as soon as I got home. When I got home I checked my oil and it was half-way between the bottom of the dipstick and add mark. Really low.
I added a half a quart when I got home and drove it. The temp gauge was getting up there 3/4 the way to the red zone, but the oil light didn't come on. I drove it to a meeting, afterwards I added a quart of oil to the engine and drove it home and it started overheating and the oil light was flickering again. No white smoke, so it's not burning it. It's got to be leaking from somewhere, right? to lose that much oil?
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Alright, car's overheating, but generally not at under ~55mph or so. When I hit the highway and accelerate, the thermostat climbs and hovers 3/4s of the way to red. But only sometimes. Sometimes, often when I'm going down a hill, it will swings down to normal. Once it's gotten hot, if I take it off the highway and am idling or driving in the 15-40mph range, the temp gauge will spike. But only sometimes. Sometimes I'll hear the fans kick in while it's idling/overheating. The temperature will go back to normal, and then rise again and stay there or spike (seemingly randomly). It's never reached all the way to the red, but it toes the line. And I take the darn thing into the shop and it refuses to overheat.
I've taken the radiator reservoir out and there seems to be green fluid (antifreeze/coolant?) in the water (have flushed it repeatedly)...and over the course of several weeks, the water level itself will go down. Both fans and the thermostat have been replaced in the last 6 months. Additionally, the timing belt and serpentine belt have been replaced within 5 months, as have affected pistons.((S/N--RPMs are really....low? ~2500 @ 75mph? but don't seem to correlate w/temperature. would they effect it?)
I took it into my shop and they said "we ran all the tests and couldn't find anything wrong." Cool? I'm at a loss..
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When it is cold outside and I want to turn my heat on in my car, it takes a loooong while for heat to be produced. I have to have the car moving at a high rate of speed before any heat is made. Even when it is turned all the way to the hottest setting it just spits out cold air. Here is the real problem. If I have the temperature on the heat and the car is idle, the temperature gauge on the instrument panel starts to move around to the RED side(meaning the engine is hot, right?)
As long as the car is moving the gauge will stay in the BLUE(engine is cool, right?) As soon as I stop the car at a red light or sit in traffic(which is usually the case) sure enough the little temperature needle begins to make its way to the RED side. As soon as I move again, it normals again. I have taken this to several mechanics and they have said that they do not know what is wrong and they think that it may just be a faulty temp gauge(this does not seem right) I do not really know if the car is in fact overheating when the gauge starts its travels or if the car is fine and I just have something that is faulty.
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Out of nowhere my check engine light came on bought some oil thought it was low, and i just recently got an oil change. Checked my sparks and it was okay. Couple hours later my car began over heating With engine light still on, and my temperature gauges increased knew something was wrong, filled it with anti freeze to cool it down, continued driving and the issue continued. Bought me a knew sensor, I noticed it worked but did not fix the issue, my car continues to over heat, couple days later without driving it, this morning on my way to work it was really cold so my car did not overheat, but my check engine light began blinking and my vehicle began rattling from my house all the way to work, for about 9 miles. Whats wrong with it? Is it safe to drive back home after work.??
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After a trip of about an hour to the Fryeburg Fair yesterday I noticed my temperature gauge needle was going way up. I was able to park my car and went to the fair for about 4-5 hours. Before we left I checked the coolant level as the car had cooled off enough to take the cap off. The coolant right to the top and was green. I checked my oil level and that was fine. On the way home my son suggested that I turn the heat on. I did so and the temp gauge went down to normal and stayed that way all the way back home to Lewiston, Maine. I'm thinking it might be the thermostat but thought I would for any other possible reasons my car is doing this. The car has about 216,000 miles and I did have the thermostat replaced a couple of years ago.....???
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97 Accord Lx - 215k miles - 4 cyl. - regular maintenance. It's been my daily driver for over 5 years and been running perfectly.
Yesterday I drove the 35 miles from work back to my town but before going home stopped to visit someone for about an hour. When I came out to leave I noticed a larger than normal amount of fluid in the drive. I just thought it was condensation from the AC and that it was more because it was extremely hot yesterday (100+).
When I got within 2 miles of the house the 1st thing was that the AC was not blowing as cold. I turned it off. Then the engine seemed to "pulse" with loss of power, and the temperature gauge was maxed out. As I pulled into the driveway the engine light and oil pressure light came on.
After it cooled down I checked and the coolant was a little low, so I topped it off. The oil was really low and I added three quarts to bring it to full.
This morning I started it up and let it idle while I finished getting ready (5-10 minutes) and the temp gauge was about 1/3rd of the way up (where it normally is). It sounded, felt, and drove as normal but after a mile or so the gauge was climbing extremely fast so I turned around and took it back home.
What it might be? Water pump?
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The other night I passed a car overheating (Subaru) and checked my temp gauge and saw my needle was gradually climbing towards the half mark. This is not normal for my 96 Honda Accord. No lights coming on, so I blasted the heater and needle immediately returned to it's normal position. Filled the coolant, it was low, but the problem remains if the heater isn't turned on to at least 3. This doesn't seem extreme enough to be the thermostat. Could my fan be out?
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I've figured out why my car has been overheating lately, the fans aren't running at all! How do I get the front end off and check things out, is there a fuse diagram for the B6...
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As the title says, car is overheating. Car gets to 190F within a couple miles drive. Temperature fluctuates between 190F and 225F.
Water pump was replaced ~2 months ago. Was not overheating prior. Temp reached 190F and stayed. Currently has the "black top" coolant temp sensor.
I noticed the coolant fans are not running after I turn the ignition off. This time of year they would usually be running after turning the engine off. If car is overheated and with AC off the fans do not run while engine is running.
I used the guide below to try diagnosing the cause: [URL] ....
Remember both fans should come on in slow speed any time the key is on and the AC is on - if the temperature is above about 32 F (0 C). Both fans run with key on and AC on
S180 (fuse 8, 30 amps, green plastic, above battery) must be good for slow speed operation.
Fuse and holder look good: no melting, no discoloration.
S164 (fuse 3, 40 amps, metal strip, above battery) must be good for fast speed operation.
fuse looks good: unbroken.
To ensure the AC circuits and the Fan Control Module has power check:
Fuse 5 on the cabin fuse panel.
Fuse 16 on the cabin fuse panel. When this fuse is blown the radiator fans will often run unexpectedly.
Fuse 25 on the cabin fuse panel.
All three fuses look good: unbroken
For the first test of the slow speed fans from the radiator thermoswitch have the key off.....Both fans should run in slow speed.
Passed test: both fans run slow
The second test is for the fast speed fans, key on, AC off.... Both fans should run in fast speed.
Passed test: both fans run fast
If the fans run in the tests above, then you should be good to go. No further tests are needed.
If you have been seeing high coolant temperatures and the fans have not been running, then you may need a new thermoswitch.
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I have a 2001 toyota camry ce in Miami, fl which is overheating. the fans seem to come on only if i turn on the a/c. however the temperature still rises and gauge needle hits red. if on idle the fans never come on. observed fluid inside radiator with cap off and it does not run through while on idle with a/c off, it just gets hot. changed thermostat and added new 50-50 antifreeze, still same. I'm suspecting a switch but why is fluid never running even when hot? I even drive it with hood open (unlatched) to let a bit more air in and still overheats, even with a/c on and fans running (again, they only turn on with a/c on), it overheats.
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So i have a 2002 1.8t that i got in december. Everything has been great so far untill the other day the car overheated on me in traffic. It was a bit warm out maybe 75-80 degrees. I saw the needle start to climb and then the light went on so i through the heat on full blast and it dropped the needle a bit and turned the light off long enough to pull off the highway. I let it cool down and checked things out. I am not low on fluid, an the fluid was changed within the last year with the vw recommended stuff. The radiator hoses are pressurized so i believe that the pump and thermostat are working. I am thinking it could have something to do with my fans. I tested them in my driveway by supplying them with 12v and the spun perfectly. It only happens when the car is standing still for a period of time. Driving at any speed is fine. Is there some sort of switch that tells the fans to turn on?
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My car just started over heating and I checked the fans and they are not running. I'm new to the VW family and although I love the way this car drives I've been baptized with quite a few problems.
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I have a V8 engine, and I have been getting the coolant overheating warning come on once in a while.
The engine fans go crazy, and the temperature needle on the small round gauge climbs all the way to red then the coolant overheating warning comes on in dash screen.
This can happen right after I turn the car on, or on occasion, it can happen as I am driving around the city.
I stop, switch the car off, and I turn it back on after a minute, and the car is just fine. So, basically, it doesn't seem like the engine coolant is actually overheating, but the fans and warning systems seem to think that they are. The fans are pretty loud, and its noticeable when they go on, and when this happens, I know that the needle will go all the way up and the warning will go off. I also know that if I turn the car off for a minute, and it will be just fine.
The conditions are random for when this happens. So its not when its particularly hot or cold or anything predictable. Could this just be a sticky thermostat? Is it a bad water pump? Bad battery?
The trouble is that now I am afraid I cant take a real drive. Around the city I can just pull over, but I am afraid to take the car two hours out or something.
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My Subaru just had the thermostat replaced, and it seemed to work until the wife took it she said it over heats when not driving the fans are working, it's over flowing out the reserve tank the fluid looked good when changed the thermostat so I don't think it's the head gasket my next guess would be either the water pump... After I last changed the thermostat and test drove it I felt the upper radiator hose it was hot but the bottom one was cool/warm.
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2005 Dodge Neon SXT 206XXX
Long story short on a trip (about a 1 hr. drive) got about a block away from destination and gauge showed it was over heating. Stopped the car started up after five min. just fine. Got home replaced the thermostat and cap (old cap was junk). New cap was junk aftermarket so yesterday I took the same car on a half hour drive to get a Mopar cap ran just fine up again until a block away, pulled off the road turned it off let it set a few min. then didn't even show it was over heating. Let the pressure off and replaced the cap and added in a bit more coolant ran fine all the way back (even pushed speed in a few spots).
The above is just what seems to be the mechanical side of the issue. After noticing the gauge was going a bit above the normal spot I noticed my cooling fans are not coming on. Checked fuse and tested relays out to be fine. First thought is to check voltage to the fans but also tempted to check coolant temp sensor with bench test. Will be going over to my dads to do voltage testing later today.
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My Camry seems to be overheating. When I'm driving the gauge maintains and reads 6/10, when the engine is idling, it goes upto 8/10, radiator fans kick in and then temperature goes down to 6/10 and keeps cycling over a period of 5 mins.
It's got 100K miles, water pump has not been replaced yet.
I checked the hose temperature; top hose 210 F, bottom hose 192, fans kick in when top hose is around 215 F.
I checked the engine temperature where the sender is installed and it was reading 205 F. Coolant level is OK. I burped the system. Previous owner told me, he had thermostat replaced by dealer.
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