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False Alarm: Lo Coolant Level Warning after Radiator Fan Recall V70-XC70 2001

Hi,
Has anyone seen a false alarm condition on their coolant level sensor? Wondering the best way to fix/repair.

Dealer says the float sensor is stuck or bad and is recommending replacement of the coolant expansion tank assembly for $75. I can get the assy. for about $55 from parts supplier; it looks easy enough to replace. There is also a coolant level sensor available for about $33, but can't gauge how dificult a repair that is.

Question(s): Has anyone else seen this type of failure occuring within a few days of having the Radiator Fan Recal performed? Is this a coincidence or did the dealer cause the problem while performing the recall?

Is there another fix for the problem? Would a simple reset of the condition solve it? How can you tell if the float/sensor is really bad?

How bad is it to replace the coolant expansion tank on your own? (I'm an average to above average mechanical guy, but auto mechanics is not my forte) It looks like three hoses and an electrical plug connection.

Thanks for your help,
--Matt








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    False Alarm: Lo Coolant Level Warning after Radiator Fan Recall V70-XC70 2001

    First, I would drain and refill the system again. Chances are there is an air lock in the system! It is very easy to drain and slowly refill, just get the front of your car up and put a clean bucket under the rad, take the lid off the overflow bottle, open the stopcock at the bottom of the rad (you may have to remove the plastic undertray if present). Let the coolant drain fully into the bucket (~2 gallon capacity in the system), then close stopcock and very slowly add the fluid, let it trickle in to the bottle.

    You should be able to reuse the fluid since it's new anyway (assuming they renewed it when they replaced the fan) otherwise get a new bottle for $20 at the dealer and mix 50/50 with distilled water.

    As you add the fluid gently squeeze the large rad hoses to "burp" air out. Once the level is up to the middle of the overflow bottle, replace the bottle cap, lower the car and take it for a short drive, then you can top it up again - slowly.

    Apparently it is common for people to add fluid too fast and introcude a large air bubble, the only way to get it out is to drain and refill the system.

    I flushed and renewed my coolant a couple weeks ago and it was easier than changing oil (less messy too!) I used the Haynes manual as a guide and they stress this adding fluid slowly - so I did and had no problems.

    Good luck!








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    False Alarm: Lo Coolant Level Warning after Radiator Fan Recall V70-XC70 2001

    It has nothing to do with that recall BUT if there was a reason why the sensor was unplugged (60K, serp belt, or t-belt, PS fl leak), then I could see where the sensor was unplugged and is now acting up. I've seen that happen several times. It take a minute to lift the bottle up and replace that sensor, it just pulls out of the bottle (nothing leaks). I can't explain why the sensors sometimes fail by merely unplugging them but I've experienced it and the cennections will look OK too.
    A bad bottle is also possible but not as common.







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