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Old 01-25-2009, 12:20 AM   #1
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1987 29' Sovereign
Sparta , Tennessee
Join Date: Mar 2003
Posts: 507
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Paralax Temp Assure - How to test?

My paralax temp assure was charging water out of one of my batteries this past year. It is a 45 amp converter/charger that tapers the charge based on battery temperature & finally turns off when fully charged.

My question: How would you test the unit if you think it is not performing right?

My multimeter has a max of 10amps for 10 seconds.

I check the batteries today with my load meter (kal resistance meter) and then took them to wally world and they also tested both batteries and pronounced them good. 2 & 3 years old.

I am thinking I will charge the batteries due to being load tested, put them back in the trailer, hook them up, give them time to be fully charged and then hope I don't blow my 10amp meter.

I will then check the charging every 15 minutes until it turns off or it does not turn off. Literature says the total cycle from strong charge to off should not exceed four hours.

Could I get the same results by checking volts and not amps ????? Will the volts taper just as I think the amps will?

Your comments are appreciated. I have to get this thing checked out. Cajun caravan is coming up second week of march.

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Old 01-25-2009, 06:35 AM   #2
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1971 23' Safari
Groveport , Ohio
Join Date: Mar 2006
Posts: 279
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Mabey Randy from best converter will chime in if not call him. I dont think my paralax has ever shut off I think it just goes into a float charge stage. I have an agm battery so I have had no need to check the water. I would be pretty sad if I waxed it due to a bad converter. They did replace mine right after I installed it due to the voltage output being set to high at the factory. Keep us posted.

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Old 01-25-2009, 09:14 AM   #3
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2004 25' Safari
. , Illinois
Join Date: Feb 2003
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Dunno about the 80s models, but my 2004's factory converter/charger did the same thing. I talked to Randy at and I got the WFCO 55a replacement kit. Now I have 3 stage charging rather than the battery boiling unit that was installed when new. I knew I needed new batteries, but I was not going to spend a penny on new batteries before I had the new converter installed.

In my case installation took all but 40 minutes. Would have been less if I weren't so anayl....
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