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Andrew Smith
Andrew Smith, Home Appliance Technician
Category: Appliance
Satisfied Customers: 3591
Experience:  Gas cooker specialist
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My daughter has gas heating with a danfoss randall

Customer Question

my daughter has gas heating with a danfoss randall tp9000.whats wrong is the downstairs radiators are warm but the upstairs are all cold.the red light at the upstairs control button is red.Hope you can solve this problem as she lives about 60 miles from me.thank you
Submitted: 2 months ago.
Category: Appliance
Expert:  Andrew Smith replied 2 months ago.

It sounds like you need to resync the transmitter and receiver again.

Does she have the instructions for the thermostat to do this?

Customer: replied 2 months ago.
i dont think she has
Expert:  Andrew Smith replied 2 months ago.

Try this first;

http://heating.danfoss.com/PCMPDF/736v01.pdf

Expert:  Andrew Smith replied 2 months ago.

What details do you have about the unit upstairs with the red light on?

Customer: replied 2 months ago.
the thermostat is in her downstairs kitchen and the red light is on beside the top button on the left hand side
Customer: replied 2 months ago.
could you please let me know how to resync trans mitter and receiver as simply as possible
Expert:  Andrew Smith replied 2 months ago.

Do you have the make and model?

Expert:  Andrew Smith replied 2 months ago.

Is this the TP9000?

This is not wireless, this is wired.

If the the top left hand light is on then the heating should be on - it sounds like this part is working correctly?

Customer: replied 2 months ago.
no i'm sorry i don't,what would happen if she just restored it to factory settings would it put this light out and restore things back to what they were
Expert:  Andrew Smith replied 2 months ago.

Do you have the make and model of the boiler?

Customer: replied 2 months ago.
VOKERA VISION30C
Expert:  Andrew Smith replied 2 months ago.

Ok, just one thermostat?

The boiler is a combi - is it the heating not working or the hot water, or both?

Customer: replied 2 months ago.
the water is heating, the downstairs radiators are heating, but the upstairs radiators are not heating
Expert:  Andrew Smith replied 2 months ago.

ok, is she able to bleed the radiators upstairs to see if they are full of air?

what is the pressure gauge on the boiler reading?

Is there a TP9000 upstairs also?

Customer: replied 2 months ago.
she might be able to bleed the radiators upstairs/no tp9000 upstairs/the reading on the boiler is 2059
Expert:  Andrew Smith replied 2 months ago.

ok if the boiler is on and the heating is on then normally a room thermostat would control another valve.

If you have no TP9000 upstairs then the whole system must work at once, the only thing it can be is air or the pump.

What happens if she turns off the downstairs radiators one at a time, does upstairs heat up?

Customer: replied 2 months ago.
i'll get her to check these things out ,and maybe we'll get it going,whats the reason that the red light would be on?
Expert:  Andrew Smith replied 2 months ago.

If you look at the link I sent, the unit has a red light on when the heating or the hot water is on

Customer: replied 2 months ago.
thanks for your help anyway ,i'll go up tomorrow as you have given me a few things to check out.
Customer: replied 2 months ago.
her mother is only after telling me she was up the other day and while cleaning happened to turn down the thermostat upstairs down as it was sitting at 35 degrees and heard a click as she turned it.
Expert:  Andrew Smith replied 2 months ago.

So there is a thermostat upstairs?

Customer: replied 2 months ago.
could this be the answer to the problem
Expert:  Andrew Smith replied 2 months ago.

Yes, this thermostat must control a valve.

If you can find the valve near the boiler then it might be stuck closed

Customer: replied 2 months ago.
thanks
Expert:  Andrew Smith replied 2 months ago.

If you find the valve then there will be a lever on the side or end enabling you to open it manually to get the heat back on

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