Altech ALTHC014

[Bobcat73]

I have the above wireless thermostat programmed as follows: Week Days: 1 - 4.00 am 17.5 2 - 6.00 am 5 3 - 4.00 pm 17.5 4 - 6.00 pm 5 5 - 6.00 pm 5 Weekends: 1 - 5.00 am 17.5 2 - 7.00 am 5 3 - 4.00 pm 17.5 4 - 6.00 pm 5 5 - 6.00 pm 5 Radiator temperature on boiler is just less than half way. But! It's now 11.45pm on a Sunday night, and the temperature showing on the thermostat is 20.5 and the house is boiling. This is happening at random points during the day. There are no radios obstructing the signal between the thermostat and the boiler. I'm dreading my bills, as I've been trying to solve this since October, and the engineer who fitted it says it is working normally. I hope someone can help me!!

 

[Dan Robinson]

Can you post that program so that it makes some sense please?

 

[Bobcat73]

Sorry, What I mean is, thermostat is set to come on at 4am at a temp of 17.5 degrees and off at 6am at a temp of 5 degrees, then on at 4pm at a temp of 17.5 degrees, and off at 6pm at a temp of 5 degrees. I have read a number of times that setting 5 has to match setting 4, so I have this set at 6pm at a temp of 5 degrees as well. Does that make more sense?

 

[Dan Robinson]

Yes, it does make more sense, and it suggests a communications failure, or a controls failure.

What boiler do you have?

If it is not a combi, what control system does it have? (S or Y Plan)

The thermostat maybe working properly, but the controls it is wired to maybe otherwise.

 

[Bobcat73]

Hi Dan, it's a Baxi Main combi.

The engineer was only back last Tuesday and said it was fine