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Thread: Ancient Teledyne Laars Mark V heater

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    Ancient Teledyne Laars Mark V heater

    I've got an ancient Teledyne Laars Mark V heater. The pool and equipment were here when we bought the house 18 year ago and I wouldn't be surprised if this heater was installed in 1978 when the original owner built the pool.

    We never use the heater. We live in Southern California and have solar so we don't really need it. The outside of the heater has gotten so faded that I can't read the label on the on/off switch. Is the heater on when the switch is up or down? I probably should just turn off the gas to the equipment, but I might want to actually turn it on and see if it is working someday. I'm currently preoccupied with installing a new variable speed pool pump and then I've got other deferred maintenance, so it probably won't be any time soon.


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    BoDarville's Avatar
    Join Date
    Jun 2012
    DFW, Texas

    Re: Ancient Teledyne Laars Mark V heater

    Welcome to TFP!

    My Teledyne Laars heater isn't that old, but it is circa 1990 or so. On mine, the heater is on when the switch is up. I have been told that these heaters are well built and to hang on to them for as long as possible.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
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