Underfloor heating controller

5 Jul 2007
Reaction score
United Kingdom
I'm using a Timeguard TPT44: http://www.timeguard.com/pdf/instructions/tpt44.pdf
to control a newly installed heating mat.

The timer has been programmed but the flooring has not heated up.

I have re-tested the heating mat, continuity checks ok. As does the sensor.

The input supply voltage checks ok (1&2), however I can't get anything for the output (3&4) even when using the manual temperature override.

Does the contoller unit need replacing or am I missing somethng obvious?

Anyone any ideas what floor limiter means (p7 manual)?
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The floor limiter sensor is there to stop the floor temp from exceeding 30deg regardless of the room temp. As far as I know it should be installed within the floor screed/under tiles

Did you fit it?
Thanks, Pensdown. It's the first time the term's used in the instructions.

Yes, the sensor is fitted. And I can get temperature reading from it through the contoller (as per page 8 ).

Don't seem to be able to get power to the mat through the controller?
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Sorry, I've just re-read your post and terminal 3 is a link live input not an output. You need to link between 1 & 3 which is the live feed to the room stat.

To measure the output voltage you should test between 2 & 4

To confirm.

Live feed 1
Neutral feed 2
Link 1 & 3
Live to mat 4
Neutral to mat 2
Earth to mat connect to earth in feed cable. You may need a connector block because there is no earth terminal on the controller

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