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I have an HP dv5 1125nr that overheats. how do I check the fan speed?

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Really its not important --you can hear if the fan is overworking and the only important part is the bearing that wears out or makes an unusual sound-fan speed is not important,I

Posted on Sep 05, 2010

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Posted on Jan 02, 2017

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I v checked the cooling system, no leaks, new water pump, water pipes solid, changed cyl. head gasket, new radiator cap, checked water level, oil level, fan working, water circulating.


no car make or model mentioned so getting an answer is hit and miss
however what you describe indicates a fan drive problem so if it is electric fan cooled-- check the fans for full blade speed ( weak motor operation) or if viscous fan hub ( fan clutch) replace the viscous hub
it is all about moving air through the radiator when the vehicle speed is slow and the engine rpms are high
if the fan is not doing the job of pulling air through the radiator , the car will overheat
at highway speeds the ram action of the air flow virtually makes a fan useless as there is more than enough air passing through the radiator to cool the water
Im guessing here but I suspect that you have a viscous fan hub

Mar 27, 2017 | Cars & Trucks

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Why is my 1993 Audi 90cs overheating?


There are dozens of possibilities from as simple as a bad pressure cap or low coolant level to as bad as a cracked engine block. Knowing the conditions that cause the overheat would help diagnose, here's some basics--assuming the coolant is full. Only overheats at low speed is generally an airflow problem: fan not running because of a fuse, relay, temperature switch, or dead fan motor. Only overheats at high speed is generally a coolant flow problem: radiator is plugged up, faulty thermostat, water pump vanes damaged. Tell us anything you've checked, any recent repairs done, and the conditions under which it overheats.

Jun 15, 2015 | 1993 Audi 90

2 Answers

Why does my engine overheat with AC on?


Does it only overheat on the highway? What about around town at lower speeds. Do the cooling fans kick in when it overheats?
What is the vehicle make/model? More information please...

Jun 18, 2014 | Vehicle Parts & Accessories

1 Answer

Why mini cooper 03 overheats while the AC is on?


Check to see if the electric cooling fans are working. Some of the fans have 2 speeds and some need to operate on high speed constantly when the air is on. High speed could be a burnout.

There should be a temperature sensor, a fan Relay, and then the electric cooling fans.

Oct 01, 2012 | 2003 Mini Cooper

2 Answers

Engine fan not working


Could be low on coolant, the cooling fan motor, a relay, or the fuse among other things.
A mechanic would check for power at the fan motor after checking the fuse.
Is the check engine light on ?

Jul 05, 2012 | 2006 Jeep Commander

1 Answer

MY VAN IS OVERHEATING WHAT ARE THE STEPS FOR TROUBLESHOOTING


When does it overheat? At idle, or at highway speed? Is the coolant level where it should be? Overheating at idle or highway speed may be a faulty thermostat. If it overheats only at idle then it is likely a cooling fan fault. To determine if the fan is working start the engine and switch the A/C on, the fan should come on, if it does not, then you need to have the computer "scanned" to see if it can detect the reason for the fan not coming on. If the fan is switching on, then you need to have the water pump checked to see if in fact it is pumping coolant (this could also be the cause of overheating at highway speed) If you are overheating only at highway speed you may want to have the enigine checked for a blown head-gasket, or faulty radiator.

Apr 18, 2011 | 1997 Oldsmobile Silhouette

1 Answer

Does the hose on the fill tank need a clamp or not? why does vechile overheat if the fill tank on the side is full?


A clamp might not be needed, this is not under pressure. It would not hurt to have one, but a simple spring clamp is adequate.
A vehicle can overheat for many reasons. When does it overheat most? During periods of slow speed, stop-and-go, and idling? Or during long high-speed drives on the highway?

If it is mostly idle and slow speed, check your cooling fan. Mostly they are thermostatically controlled, only turning on when needed. If this does not work, check the fan relay, fan motor, and fan thermostat.

If it overheats mostly at high speed, it is most likely that the radiator is partially plugged and needs to be backflushed, rodded, or replaced.

If it always overheats quickly after startup (less than fifteen minutes) it may be that your thermostat is not opening properly.

Aug 24, 2010 | 1992 Ford Explorer

1 Answer

Overheat and switches off automatically


check the cpu fan it is not working properly need clean sometime full of dast that why always became heat. epected of overheating is automatically shut down...

repair you cpu fan disasimble you laptop then check the cpu fan

thanks

Jun 01, 2009 | HP Pavilion DV5-1000US Laptop

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