Mastertemp 400 SFS error 6

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A

amywmu22

Member
May 26, 2024
18
Macomb, Michigan
Pool Size
20000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-30
Hi,

So I’m at a loss. Heater working fine all season. 2 weeks ago it stopped working and SFS code came on. I replaced stack flue sensor and checked for chewed wires etc- still not working.

I turn it on via intelliconnect and tried service mode as well. Panel lights up and immediately red “service heater” light comes on. Doesn’t even get to running or anything. Mastertemp 400 heater.

Any guidance would be useful please! Yall are the best!
 
Does the blower start running?

The sensor can be tested with an ohm meter (3.8 MegOhms @ 77F)
 
E06 is a bad board, shorted stack flue sensor or a board not set for the correct sfs (limit type switch vs. temperature sensor).

Disconnect the sensor and check continuity across its terminals.

E06 means that the board is getting a reading of 0 ohms from the sensor.

Check the resistance; if it's 0, you have a bad sensor.

Resistance should be 3.5-4.0 megaohms.

Make sure that the setting is "SF1"

1727387458570.png
 
I ask…

Does the blower start running?

You reply…

No the blower does run.

Are you saying…

Does the blower start running? - No

Or

Does the blower start running? - the blower does run.

????
 
  • Haha
Reactions: JamesW
No blower means the Stack Flue Sensor or the PCB is bad. People have got bad new SFS.

Test the old and new SFS you have using a multimeter - (3.8 MegOhms @ 77F).
 
ajw22 said:
No blower means the Stack Flue Sensor or the PCB is bad. People have got bad new SFS.

Test the old and new SFS you have using a multimeter - (3.8 MegOhms @ 77F).
Click to expand...
Ok so my husband was tinkering with the heater, he got it to turn on and when we put the top back on it went to service heater and turned off. But he did get it to turn on and work. Suggestions? Or same thing as said above with new board?
 
Sounds like a loose connection somewhere.

Need to know the exact behavior when it starts and shuts down.
 
ajw22 said:
Sounds like a loose connection somewhere.

Need to know the exact behavior when it starts and shuts down.
Click to expand...
In service mode- turn on pump, hold down both relays to demand response to turn heater on. Heater panel lights up- all lights- then service heater light goes on and off- heater fires up and goes on for about 1 minute then heater goes off and service heater light comes on.

I put my hand over the exhaust and it was super hot and had condensation on my hand -
If I can post videos I can post it

We replaced thermal regulator too as it was very corroded and that didn’t solve the problem either.
 

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Exhaust Gas Temperature.​

While running, press and hold the On button to display the exhaust temperature (Older Models).

The new models use the Menu to get the SFS.

Here is what the normal exhaust temperature should be:

  • Below 250 degrees...very low
  • 250 to 290 ..................low
  • 290 to 350.................acceptable
  • 350 to 480 ..................high
  • Above 480...................error/shutdown.
Note: HD models can be up to 75 degrees higher. HD models use a cupro nickel exchanger and the efficiency is slightly lower resulting in less heat transfer and more waste heat.

If the exhaust gas temperature is higher then normal then water may be bypassing the heat exchanger through a broken bypass valve.

If you hold down the "pool on" button, it stays on 80, then flashes to 40, then back to 80, then the 80/40 reading and E05 indicate that the board is not getting a reading from the sensor. It's usually a bad sensor or damaged wires.



Pentair MasterTemp Heaters - Further Reading

www.troublefreepool.com www.troublefreepool.com
 

E05 means that the board is getting a reading of O.L (Open Line) from the sensor.

Open Line or (Over Limit) means that the resistance is infinite or over the limit of the meter.

O.L means that there is no continuity between the two test points.

E06 means that the board is getting a reading of 0 ohms from the sensor.

The sensor should read about 3.8 Megaohms, which is 3.8 million ohms at 77 degrees F.
 
ajw22 said:

Picture Posting and Resizing - Further Reading

www.troublefreepool.com www.troublefreepool.com




Did you check the internal bypass valve?

What is your filter PSI? When did you last backwash your sand filter?

What flow does your VSF pump show?
Click to expand...
Did not check internal bypass valve. Filter PSI is at 17- we backwashed before trying to figure this heater out.

Any of you live in Michigan to come look at it?! 😂
 
While running, press and hold the On button to display the exhaust temperature (Older Models).

The new models use the Menu to get the SFS.

Here is what the normal exhaust temperature should be:

Below 250 degrees...very low
250 to 290 ..................low
290 to 350.................acceptable
350 to 480 ..................high
Above 480...................error/shutdown.
 
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