Not again...!
Thread Starter
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Road Master
Joined: Feb 2014
Posts: 1,083
Likes: 381
From: Queanbeyan, Australia
Not again...!
It was only about 3 weeks ago that I had the check engine and overtemp idiot lights come on.
I since have had the thermostat repaired only to have the lights come on again today.
There seems to be no loss of coolant so I'm thinking maybe its a faulty temp sender unit?
To be safe I'll get her trailered back to the dealership for investigation and rectification of the fault. What a bummer... Just when I thought I had the problem licked....
I since have had the thermostat repaired only to have the lights come on again today.
There seems to be no loss of coolant so I'm thinking maybe its a faulty temp sender unit?
To be safe I'll get her trailered back to the dealership for investigation and rectification of the fault. What a bummer... Just when I thought I had the problem licked....
Road Master
Joined: Feb 2012
Posts: 801
Likes: 408
From: Middle Tennessee
Ask the service writer if they are purging all of the air after filling the coolant tank. I am not familiar with twin cooled systems but I believe the total coolant volume is pretty small.
From past experience on automobile coolant flushes and refills, if you get air trapped in some, and it is easy to do on some systems, you will get an air pocket that gets super hot steam trapped. Depending on where your temp sensor is it will read the steam temp and not true coolant temp.
Regardless, purging the air needs to be done. I am sure HD has a procedure for it.
From past experience on automobile coolant flushes and refills, if you get air trapped in some, and it is easy to do on some systems, you will get an air pocket that gets super hot steam trapped. Depending on where your temp sensor is it will read the steam temp and not true coolant temp.
Regardless, purging the air needs to be done. I am sure HD has a procedure for it.
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
Likes: 4,440
From: anacoco, la
if I remember correctly, you paid for this repair on your own dime, yes? if so, I wouldn't pay for it again, they need to make it right.
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6th Gear
Joined: Aug 2008
Posts: 12
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From: Jersey
Did you replace the water pump when you did the thermostat? Just had the pump go on mine, replaced the thermostat at the same time - sounds like the pumps are a fairly known issue from what I've read and several folks did both just to be sure (pump was $400 for parts, thermostat was $75).
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Thread Starter
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Road Master
Joined: Feb 2014
Posts: 1,083
Likes: 381
From: Queanbeyan, Australia
THis problem has only just started a couple of weeks ago. I have 39000 KM on her. Yes, the first couple of years were problem free.
Thread Starter
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Road Master
Joined: Feb 2014
Posts: 1,083
Likes: 381
From: Queanbeyan, Australia
Did you replace the water pump when you did the thermostat? Just had the pump go on mine, replaced the thermostat at the same time - sounds like the pumps are a fairly known issue from what I've read and several folks did both just to be sure (pump was $400 for parts, thermostat was $75).