Question about 1993 Acura Legend

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My fan fuse blows when it gets hot

I've replaced the hoses and thermostat. But the car heats up real fast the blows the fuse.

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About the only thing that would cause the fan fuse to blow is either the fan has a problem and is dragging or a short in the wiring. I would bet the fan motor is probably bad. The hoses and thermostat have nothing to do with the fan motor fuse blowing.

Posted on Jul 29, 2009

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No heat in my 72 mark IV


The first item to check is the engine temperature. To help cold engines warm up fast, the flow of coolant is restricted by way of the thermostat-a thermal valve that opens when it's hot and closes when it's cold. When the thermostat wears out, it remains stuck open or shut, which leads to either overheating or cool operation. A worn-out thermostat might be preventing the coolant from getting warm enough to heat the cabin. Replacing the thermostat can be a 20-minute job or a real hassle. Check your service manual to see how involved the replacement is.

If the thermostat is fine, the flow of coolant in the heater core may be restricted by built-up goop. Sediment and grime can accumulate between coolant changes and collect in the heater core. A flush can be done by disconnecting the heater hoses at the water pump (when the car is cold) and using compressed air to push the coolant and gunk backward, out the inlet hose. Be sure to capture all the old coolant and dispose of it properly. Follow that with a few rounds of filling the core with tap water and flushing it out in the same way, then refill the core with mixed coolant and reattach the hoses. None of these fixes is hard, but the heater-core flush is messy, so you might want to take your car to a shop for service.

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My heat in my 1997 oldsmobile isn't blowing real hot how do I fix that?


First, check the coolant level. If it's low, your heater core will be the first thing to starve of coolant. If it's ok, check the running temperature. You probably don't have a heat gauge, but if the heater hoses aren't getting hot, you likely need to replace the thermostat. It's at the base of your upper rad hose under a housing held by two bolts.

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1 Answer

I'm fues to my fan keeps going out on my 2006 P.T


More than likely you have an internal fault either in the fan itself or the thermostat that activates it.

For a fuse to blow it has to have a lot higher than normal current draw through it, which is normally refered to as a short. If the fuse blows almost immediately then I would suggest you unplug the fan, and see if the fuse blows with just the thermostat in the circuit. If it blows - replace the thermostat control. If it doesn't blow, plug in the fan and watch it. If it trys to start and then blows the fuse, replace the fan motor.

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1 Answer

1996 Cadillac Deville -car shows that it is overheating, a/c blows hot -took the car to 3 different shops - 2 said its the heads - 1 said its the fan blowing a fuse causing the fan not to cut on when...


if its overheating, first check water level in radiator ( i assume youve done that).. next most likely, check thermostat located inside upper radiator hose where it mounts on front of motor... replace the thermostat ( a few bucks) being careful to reinstall the same direction as the original one... see if this corrects the over heating.

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1 Answer

Changed the thermostat still doesn't heat


parked or moving both? ?
why not post symptoms,??? and ask for real help not wild guesses.????????? real as in diagnostic?
my guess is the HVAC system heater i dead? dead cold on all modes and the power works on HIGH?
right?
ill guess, heater cold on fast fan.
here are the checks (I use a scan tool for ECT temp )

1: first i touch the top rad hose is it too hot to hold hand there.?
yes, that is 180F to 200F there. so is good, if not fix THAT First.
2: then step 2, heater core hoses, 2 hoses there hot same rules.
yes, no?

ill stop here,, but this is first.

first is engine heat, changing thermostat if engine hot, is a waste of time. and cash.
the engine heat can be seen 4 ways
1: dash gauge, at normal. (if don't know normal ,all this wasted)
2: IR pyro gun, check. best. a $15 tool. ends guessing .
3: scan tool ECT shows, 180F more, passes tests very good method here and is free if you have any scan tool.
4; hand flies off hose test. crude but effective, if not sure try on car that works, now you know where 180F is. "experience":

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3 Answers

I HAVE A 1996 ELDORADO, JUST WENT TO JIFFY LUBE TO GET MY OILS CHECKED ON THE WAY HOME CAR STARTS TO OVER HEAT AND i NEVER HAD THAT PROBLEM BEFORE, HEAT DONT HEAT UP AND OVER HEATS REAL QUICK I DONT SEE...


Welcome to FixYa.com



Have the coolant checked;if ok i would have the thermostat checked and replaced.



Thank you for using FixYa.com

Regards, Lee Davidian

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1 Answer

Audi A4 1.9tdi Quattro 1997- Blower fan was only blowing cold air. Changed intercooler radiator as it was leaking, but fan still blowing cold air. engine temp went over half and then came back down. Only...


REPLACE THERMOSTAT.MAKE SURE COOLANT SUPPLY PIPE OR COOLANT RETURN PIPE NOT STOPPED UP AND YOU HAVE ENOUGH COOLANT IN THE SYSTEM.REPLACE THERMOSTAT.CRANK ENGINE UP AND LET IDLE UNTIL WARM UP KEEP EYES ON TEMPERATURE GAUGE. WHEN ENGINE THERMOSTAT OPEN COOLANT HOSE SHOULD BE HOT.IF NOT TURN OFF ENGINE.USE LARGE RAG WAIT A WHILE BEFORE REMOVING RADIATOR CAP CHECK TO SEE IF COOLANT LEVEL DROPPING IF SO ADD MORE COOLANT.CRANK ENGINE UP UNTIL THERMOSTAT OPENS UP.HOSE WILL GET HOT.IF STILL COLD CHECK COOLANT LEVEL.ONCE YOU AIR OUT COOLANT SYSTEM RADIATOR HOSES WILL GET HOT SO YOU WILL GET HEAT.IF COOLANT LOW YOU WONT GET NO HEAT.

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1 Answer

I just replaced my thermostat and all fluids are full and my heat is blowing luke warm, the hose to the heater core is hot real hot still not blowing hot


Check the return line on the heater core. If its not warm or hot, the core has a clog. Will have to be replaced.

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1 Answer

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To prove the valve that gives water pass towards the heating if this one does not open you have no heating inside the car

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