Last seen: Dec 18, 2025
Hi @shapingstuff - you can't set back a Grant ASHP overnight by changing the leaving water temperature setpoint. Ideally, a climate curve offset could...
The wireless thermostat could be dual channel, heating and hot water. If there’s no other timer near the cylinder for scheduling hot water then the wi...
@bontwoody the item circled is the cylinder thermostat. It displays the cylinder temperature. Turn the dial and the display changes to the set tempera...
Hi @ericdo, thanks for update. You’re sadly in a difficult situation. The LA moving the goal posts part way through is par for course. An acoustic e...
@shadowfax good. You have a 4 channel digital programmer, but only one channel, 1, will be used for hot water timing. It's a unit badged up by Grant b...
1pm - 2pm daily is a good time 🙂 I have a small 3.6kW solar PV+battery. In summer hot water is free via any morning solar generation stored in the ba...
Hi @shadowfax - I’m sure we can help. First, what device controls your hot water timing? Do you have a timer unit like the one on the left here somewh...
@ggw there should be a manual flow setting and indicator gauge on the system pipework. Grant fit one looking like this. It indicates flow in litres/mi...
@roamingbull You running on weather compensation? If the house is too cold when it's milder and warmer outside you may need to flatten the WC curve a ...
@ggw I think you've nailed the issue. Very odd. I think you may have a faulty outdoor temperature sensor probe, if the unit is under warranty this ...
I have a Grant ASHP and have the HW output from it set at 60degC for 75 minutes daily. This will charge my 250litre pre-plumb Grant cylinder to 55degC...
Immersion heater built-in thermostats are not that accurate. Mine is set to 65degC and cuts out when used with a solar PV diverter. However, the tank ...
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