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cooling fans

Question:

I have a 1994 Buick regal and only one cooling fan will kick on when the engine gets hot. I have tried turning the defrosters on and the air to see if they both kick on but only one will. I was told that the other cooling fan will only kick on at a higher temperature. Is this true or is there something wrong with one of the cooling fans? Thanks for any help!

Response:

> I have a 1994 Buick regal and only one cooling fan will kick on when > the engine gets hot. > I have tried turning the defrosters on and the air to see if they > both kick on but only one will. > I was told that the other cooling fan will only kick on at a higher > temperature. Is this true or is there something wrong with one of the > cooling fans?

That is true. Ian

Response:

I bought an after-market brake master cylinder for my Accord and it failed miserably after just two weeks. This was my last after-market part. My firend, who is a certified Honda technician, told me after-market parts for American made cars are acceptable but NOT for Honda’s as they are very inferior which I learned the hard way. Good luck. There are several online parts suppliers with great prices. One being www.hparts.con & www.manhonda.com. Hparts has the best prices. – Hide quoted text — Show quoted text – > Thanks to all that responded, I appreciate the help.  You have given me a > good starting point.  But about that inexpensive genuine Honda cap,  After > paying 55 bucks for Honda front brake pads.  Genuine Honda parts make me > nervous.  But some time Honda parts are called for. Thanks again for all the > suggestions everybody. > Jerry > I had this problem with my 92 Accord. The fans would work fine with air > cond. running but not when air was off. It turned out that the cooling > system was not under pressure as a result of the radiator cap being bad. > My Honda mechanic put his hand on the large hose that runs from the top > of the radiator to the front of the engine and could squeeze it easily, > while the engine was running, which meant it had no pressure. If you > can’t squeeze easily the system has pressure. I would guess you will > find yours has no pressure. > I would suggest replacing the cap before the thermostat as they are only > about $5 and a lot less work. Strange thing about this situation was the > car never over-heated. (thermostats rarely go bad) > Anyway, buy a new genuine Honda cap and it should solve your problem > inexpensively.

Response:

Thanks to all that responded, I appreciate the help.  You have given me a good starting point.  But about that inexpensive genuine Honda cap,  After paying 55 bucks for Honda front brake pads.  Genuine Honda parts make me nervous.  But some time Honda parts are called for. Thanks again for all the suggestions everybody. Jerry – Hide quoted text — Show quoted text – > I had this problem with my 92 Accord. The fans would work fine with air > cond. running but not when air was off. It turned out that the cooling > system was not under pressure as a result of the radiator cap being bad. > My Honda mechanic put his hand on the large hose that runs from the top > of the radiator to the front of the engine and could squeeze it easily, > while the engine was running, which meant it had no pressure. If you > can’t squeeze easily the system has pressure. I would guess you will > find yours has no pressure. > I would suggest replacing the cap before the thermostat as they are only > about $5 and a lot less work. Strange thing about this situation was the > car never over-heated. (thermostats rarely go bad) > Anyway, buy a new genuine Honda cap and it should solve your problem > inexpensively.

Response:

> Help, >     My daughters 88 accord over heated today.  It seems that the electric > cooling fans don’t come on.  They both come on when the a/c is turned on but > not when the engine gets hot.  Were is the sensor that controls the fans? > Is this sensor the likely culprit?  After it cooled down I added fluid and > started it up and watch the temp gauge go from cold up to warm and hot with > out the fans coming on.  I guess she could drive around with the a/c on but > I don’t think that would really be a good idea.  I could use some help. > Jerry

The thermo switch is located in the radiator. There will be 2 wires going to it. Disconnect the wires and short them together. If the fan comes on, the switch is bad. There is also a relay in the underhood fuse box and I think a timer (location unknown). I have an old timer from my nieces 84 Civic, and it looks too clean to have been in the engine compartment, so I assume it’s under the dash or in a kick panel. It’s about 3" square by 1" thick and takes a 7 pin connector.

Response:

> Help, >     My daughters 88 accord over heated today.  It seems that the electric > cooling fans don’t come on.  They both come on when the a/c is turned on but > not when the engine gets hot.  Were is the sensor that controls the fans? > Is this sensor the likely culprit?  After it cooled down I added fluid and > started it up and watch the temp gauge go from cold up to warm and hot with > out the fans coming on.  I guess she could drive around with the a/c on but > I don’t think that would really be a good idea.  I could use some help. > Jerry

The sensor is in the radiator. I’m not sure where it is on your car, but the 84 Civic I’m driving has it near the bottom right engine side. There should be 2 wires to it. If you disconnect the wires and short them together, the fan should come on if the switch is bad. I would think that is probably the culprit. There is also a relay located in the underhood fuse box and a timer located God knows where.

Response:

same problem with my 89 prelude it was the thermostat. replaced it, and all was well. worth a look. Rob R.

– Hide quoted text — Show quoted text -> Help, >     My daughters 88 accord over heated today.  It seems that the electric > cooling fans don’t come on.  They both come on when the a/c is turned on but > not when the engine gets hot.  Were is the sensor that controls the fans? > Is this sensor the likely culprit?  After it cooled down I added fluid and > started it up and watch the temp gauge go from cold up to warm and hot with > out the fans coming on.  I guess she could drive around with the a/c on but > I don’t think that would really be a good idea.  I could use some help. > Jerry

Response:

I had this problem with my 92 Accord. The fans would work fine with air cond. running but not when air was off. It turned out that the cooling system was not under pressure as a result of the radiator cap being bad. My Honda mechanic put his hand on the large hose that runs from the top of the radiator to the front of the engine and could squeeze it easily, while the engine was running, which meant it had no pressure. If you can’t squeeze easily the system has pressure. I would guess you will find yours has no pressure. I would suggest replacing the cap before the thermostat as they are only about $5 and a lot less work. Strange thing about this situation was the car never over-heated. (thermostats rarely go bad) Anyway, buy a new genuine Honda cap and it should solve your problem inexpensively.

Response:

Help,     My daughters 88 accord over heated today.  It seems that the electric cooling fans don’t come on.  They both come on when the a/c is turned on but not when the engine gets hot.  Were is the sensor that controls the fans? Is this sensor the likely culprit?  After it cooled down I added fluid and started it up and watch the temp gauge go from cold up to warm and hot with out the fans coming on.  I guess she could drive around with the a/c on but I don’t think that would really be a good idea.  I could use some help. Jerry

Response:

I bought an after-market brake master cylinder for my Accord and it failed miserably after just two weeks. This was my last after-market part. My firend, who is a certified Honda technician, told me after-market parts for American made cars are acceptable but NOT for Honda’s as they are very inferior which I learned the hard way. Good luck. There are several online parts suppliers with great prices. One being www.hparts.con & www.manhonda.com. Hparts has the best prices. – Hide quoted text — Show quoted text – > Thanks to all that responded, I appreciate the help.  You have given me a > good starting point.  But about that inexpensive genuine Honda cap,  After > paying 55 bucks for Honda front brake pads.  Genuine Honda parts make me > nervous.  But some time Honda parts are called for. Thanks again for all the > suggestions everybody. > Jerry > I had this problem with my 92 Accord. The fans would work fine with air > cond. running but not when air was off. It turned out that the cooling > system was not under pressure as a result of the radiator cap being bad. > My Honda mechanic put his hand on the large hose that runs from the top > of the radiator to the front of the engine and could squeeze it easily, > while the engine was running, which meant it had no pressure. If you > can’t squeeze easily the system has pressure. I would guess you will > find yours has no pressure. > I would suggest replacing the cap before the thermostat as they are only > about $5 and a lot less work. Strange thing about this situation was the > car never over-heated. (thermostats rarely go bad) > Anyway, buy a new genuine Honda cap and it should solve your problem > inexpensively.

Response:

Thanks to all that responded, I appreciate the help.  You have given me a good starting point.  But about that inexpensive genuine Honda cap,  After paying 55 bucks for Honda front brake pads.  Genuine Honda parts make me nervous.  But some time Honda parts are called for. Thanks again for all the suggestions everybody. Jerry – Hide quoted text — Show quoted text – > I had this problem with my 92 Accord. The fans would work fine with air > cond. running but not when air was off. It turned out that the cooling > system was not under pressure as a result of the radiator cap being bad. > My Honda mechanic put his hand on the large hose that runs from the top > of the radiator to the front of the engine and could squeeze it easily, > while the engine was running, which meant it had no pressure. If you > can’t squeeze easily the system has pressure. I would guess you will > find yours has no pressure. > I would suggest replacing the cap before the thermostat as they are only > about $5 and a lot less work. Strange thing about this situation was the > car never over-heated. (thermostats rarely go bad) > Anyway, buy a new genuine Honda cap and it should solve your problem > inexpensively.

Response:

> Help, >     My daughters 88 accord over heated today.  It seems that the electric > cooling fans don’t come on.  They both come on when the a/c is turned on but > not when the engine gets hot.  Were is the sensor that controls the fans? > Is this sensor the likely culprit?  After it cooled down I added fluid and > started it up and watch the temp gauge go from cold up to warm and hot with > out the fans coming on.  I guess she could drive around with the a/c on but > I don’t think that would really be a good idea.  I could use some help. > Jerry

The thermo switch is located in the radiator. There will be 2 wires going to it. Disconnect the wires and short them together. If the fan comes on, the switch is bad. There is also a relay in the underhood fuse box and I think a timer (location unknown). I have an old timer from my nieces 84 Civic, and it looks too clean to have been in the engine compartment, so I assume it’s under the dash or in a kick panel. It’s about 3" square by 1" thick and takes a 7 pin connector.

Response:

> Help, >     My daughters 88 accord over heated today.  It seems that the electric > cooling fans don’t come on.  They both come on when the a/c is turned on but > not when the engine gets hot.  Were is the sensor that controls the fans? > Is this sensor the likely culprit?  After it cooled down I added fluid and > started it up and watch the temp gauge go from cold up to warm and hot with > out the fans coming on.  I guess she could drive around with the a/c on but > I don’t think that would really be a good idea.  I could use some help. > Jerry

The sensor is in the radiator. I’m not sure where it is on your car, but the 84 Civic I’m driving has it near the bottom right engine side. There should be 2 wires to it. If you disconnect the wires and short them together, the fan should come on if the switch is bad. I would think that is probably the culprit. There is also a relay located in the underhood fuse box and a timer located God knows where.

Response:

same problem with my 89 prelude it was the thermostat. replaced it, and all was well. worth a look. Rob R.

– Hide quoted text — Show quoted text -> Help, >     My daughters 88 accord over heated today.  It seems that the electric > cooling fans don’t come on.  They both come on when the a/c is turned on but > not when the engine gets hot.  Were is the sensor that controls the fans? > Is this sensor the likely culprit?  After it cooled down I added fluid and > started it up and watch the temp gauge go from cold up to warm and hot with > out the fans coming on.  I guess she could drive around with the a/c on but > I don’t think that would really be a good idea.  I could use some help. > Jerry

Response:

I had this problem with my 92 Accord. The fans would work fine with air cond. running but not when air was off. It turned out that the cooling system was not under pressure as a result of the radiator cap being bad. My Honda mechanic put his hand on the large hose that runs from the top of the radiator to the front of the engine and could squeeze it easily, while the engine was running, which meant it had no pressure. If you can’t squeeze easily the system has pressure. I would guess you will find yours has no pressure. I would suggest replacing the cap before the thermostat as they are only about $5 and a lot less work. Strange thing about this situation was the car never over-heated. (thermostats rarely go bad) Anyway, buy a new genuine Honda cap and it should solve your problem inexpensively.

Response:

Help,     My daughters 88 accord over heated today.  It seems that the electric cooling fans don’t come on.  They both come on when the a/c is turned on but not when the engine gets hot.  Were is the sensor that controls the fans? Is this sensor the likely culprit?  After it cooled down I added fluid and started it up and watch the temp gauge go from cold up to warm and hot with out the fans coming on.  I guess she could drive around with the a/c on but I don’t think that would really be a good idea.  I could use some help. Jerry

Response:

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