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John Weiser Posted on May 05, 2012
Answered by a Fixya Expert

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Mastertemp 400 heater

My heater is dead, no lights, no nothing. I need help!

1 Answer

RSole

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  • Master 697 Answers
  • Posted on May 05, 2012
RSole
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Joined: Sep 29, 2011
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Of course there is no question here, so let's parse that line.

My heater is dead: (okay, call a funeral home)
No lights: (get fresh lights, candles...whatever)
No nothing: (double negative, meaning something)
I need help: (psychiatric, grade school level writing?..)

1) Is there power to your heater? If so, there are lots of protective switches to prevent the motor/compressor from starting and self destructing due to loss of refrigerant because of a leak. The "no lights" worries me that there may be a logic board (if your model has one) that is fried. My suggestion is to fill in the pool with sand and send the repair money to me...

4 Related Answers

Anonymous

  • 990 Answers
  • Posted on Jul 26, 2010

SOURCE: heater cycles on / off

This could be a water flo problem. you need to chech to be sure your by-pass valve is closed down enough to force water threw heater, There is a internal by-pass that could be a problem also, or a bad pressure switch. If the by-pass isn't the problem then you should check these also.

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Anonymous

  • 310 Answers
  • Posted on Nov 23, 2010

SOURCE: Pentair MasterTemp 400 Heater Will run fine for

This reminds me of some of the High temp sensors ive replaced. I would start with checking the pumps flow to the heater. Make sure there are no abstructions and at least 35 GPM (gallons per minute) running to the heater. If your flow is too low, you will trip the high limit sensor after a short while.
This could also mean you need to clean out the heat exchanger. When an exchanger gets dirty, it blocks the flow of water, slowing it down and "super heating" itdue to the water being in contact with the exchanger for too long. This will also trip the high limit and call for service.
If both the above items check out, contact me @ [email protected] and I will guide you further.

john224

John Prohaska

  • 1378 Answers
  • Posted on Mar 30, 2011

SOURCE: Have a Pentair MasterTemp 400

Thank you for posting your question here on Fixya.com.


Error code E05 can be caused by many failures in several places. The owner's manual has a decent flow chart in it to help diagnose where the trouble lies. You will find it on page 43 here...

http://www.pentairpool.com/pdfs/MasterTempOM.pdf

Identifying problems with an electronically controlled pool heater is not a job for most homeowners without training and/or experience with this type of equipment. If you are unsure how to proceed no amount of tips from a site like this will replace experience. You may want to consider hiring a professional to look at your heater.

If you decide to pursue the repairs and need additional support please post as specific a question as you can as a comment to this reply.


If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at www.arrowpools.net. Positive feedback is appreciated once your problem is solved!

Anonymous

  • 368 Answers
  • Posted on Sep 14, 2011

SOURCE: I have a mastertemp pentair

Since I don't know exactly what model you have I can only suggest you call the Pentair technical support at 800-693-0971 andthey should be able to help you figure this issue out.

I hope this helps.

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Service light on

I just had the same problem resolved, my mastertemp 400 would run up the temp to 82F and then cutoff, the service light flashes and then 50 seconds later the heater would restart and run for 2 minnutesbefore shutting down again and relighting in 50 seconds. Repeating until the temp setting is reached.

I had the pool guy out 3 times until he found a bad thermal regulator valve (kit #77707-0010). Once replaced the heater runs great.

He told me that it's my pool chemestry that is to blame, I had it checked (like I do weekely by me and monthly by the pool supply store) and it perfect??? I'm now questioning what caused the corroson and stop it from coming back?

I hope tis helps.

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