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Old 01-08-2019, 04:13 PM   #1
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Erratic Temperature gauge

Hello, I have a 2005 Fleetwood Southwind 32V with the Workhorse W20 Chassis. I have about 66,000 miles. This past weekend I went camping and saw that my temperature gauge Reading a little bit higher than normal. On my way back from camping, the temperature gauge was pegged at normal. Itís been very erratic. I double check to make sure the clutch fan was working (which it was) and the radiator had coolant.

Does anyone have any ideas on what this might be? Any recommendations are appreciated. Thank you!
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Old 01-08-2019, 04:39 PM   #2
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Remember the Temp gauge is nothing more than a idiot light. Put a Scan Gauge on it to see the real temp is.
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Old 01-08-2019, 04:41 PM   #3
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Remember the Temp gauge is nothing more than a idiot light. Put a Scan Gauge on it to see the real temp is.


Right...Will do! Thank you!
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Old 01-09-2019, 12:13 AM   #4
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Definitely a good idea to monitor real time, accurate engine data on a ScanGauge2 or similar as Dale recommended. You can also run a gauge sweep test to see if the gauge operates properly isolated from the sending unit. Hold down the mode button on the dash for about 5 seconds. From the next menu choose cluster diagnostics and then gauge test.
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Old 01-09-2019, 10:55 AM   #5
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Wow, Thanks for that info John!




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Old 01-09-2019, 11:58 AM   #6
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Definitely a good idea to monitor real time, accurate engine data on a ScanGauge2 or similar as Dale recommended. You can also run a gauge sweep test to see if the gauge operates properly isolated from the sending unit. Hold down the mode button on the dash for about 5 seconds. From the next menu choose cluster diagnostics and then gauge test.


Wow, didnít know I could do that. Just performed an it all ran properly on the sweep test. Thanks for the awesome suggestions everyone. I think I need to purchase an actual scan gauge tool
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Old 01-09-2019, 12:01 PM   #7
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Definitely a good idea to monitor real time, accurate engine data on a ScanGauge2 or similar as Dale recommended. You can also run a gauge sweep test to see if the gauge operates properly isolated from the sending unit. Hold down the mode button on the dash for about 5 seconds. From the next menu choose cluster diagnostics and then gauge test.


The fuel was about a couple millimeters off. It was reading a little bit more than half at the 50% mark. Other than that, everything read good.
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Old 01-09-2019, 03:17 PM   #8
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Wow, didnít know I could do that. Just performed an it all ran properly on the sweep test. Thanks for the awesome suggestions everyone. I think I need to purchase an actual scan gauge tool
YES, you do. The H2O "gauge" was programmed by WCC to almost always point to "normal". Once there, that is where it stays unless a real overheat occurs, at which time it will suddenly move all the way extremely high. As others stated it really is a guage at all.
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Old 01-09-2019, 11:25 PM   #9
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UltraGauge OBDII Scan tool & Information Center

That's the one I use. You'll be surprised at your actual engine temperature.

It's very beneficial to have a permanent scan-gauge attached especially if you start having check engine lights which was the reason I bought and installed mine.
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Old 01-10-2019, 01:08 AM   #10
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YES, you do. The H2O "gauge" was programmed by WCC to almost always point to "normal". Once there, that is where it stays unless a real overheat occurs, at which time it will suddenly move all the way extremely high. As others stated it really is a guage at all.


Ok last question, sorry. What is the normal temperature range I should be looking for? Thanks!
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Old 01-10-2019, 01:56 PM   #11
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The fuel was about a couple millimeters off. It was reading a little bit more than half at the 50% mark. Other than that, everything read good.


Thanks for all the info. What normal operating temperature range should I be looking at on the scan gauge?
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Old 01-10-2019, 02:13 PM   #12
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It will vary between 198*F and 205*F during at highway speeds. Increases going uphill will have activated the fan clutch and hopefully that will prevent you ever seeing 210*F, although it wonít hurt anything if you do. I would be alarmed by higher readings, but not pull over for a cool down unless I saw 220*F or more.
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Old 01-11-2019, 06:20 AM   #13
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If you have 50/50 antifreeze and a 15 psi pressure cap you're looking at a boiling point of about 265į

Check yoir pressure cap.
Check your radiadtor ptessure.
Old antifreeze?
Less than 50/50 ratio.
Clean the radiator for good air flow.
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Old 01-14-2019, 05:04 PM   #14
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Quote:
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If you have 50/50 antifreeze and a 15 psi pressure cap you're looking at a boiling point of about 265į

Check yoir pressure cap.
Check your radiadtor ptessure.
Old antifreeze?
Less than 50/50 ratio.
Clean the radiator for good air flow.


Thank you so much!!
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