Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
Grant Aerona 9kW - ...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Grant Aerona 9kW - the saga continues

 
Air Source Heat Pumps (ASHPs)
Last Post by Mike Patrick 24 minutes ago
1 Posts
1 Users
0 Reactions
11 Views
RSS
 Mike Patrick
(@mike-patrick)
Reputable Member Member
Joined: 6 years ago
Posts: 197
Topic starter 14/11/2026 10:41 am   [#3225]

This needn't be a new topic but I can't find my previous posts on the subject using Wattson, so here goes.

My Grant Aerona is 10 years old now and has been something of a money pit ever since.

The most recent problem was in February this year when it stopped working with a P1 error code.

Initially advised that I needed a new ASHP,  a solution was eventually found that involved a new PCB and compressor at a cost of £2,000. This had taken until April given the difficulty of finding engineers who understood the problem. That is our second replacement PCB.

Everything seemed to be well. In May, as usual, I switched the controller to DHW only as the house kept itself warm enough without heating.

Fast forward to the end of September I switched the controller back to UFH as well and all seemed to be OK. But recently (to coincide with the later onset of cold weather) the ASHP has stopped responding to the controller calling for UFH and only comes on for the hot water. There is no error code and everything else appears normal, except we have a cold house.

We are back now where we were in February waiting for our local heating engineers (who were not the original installers but are Grant approved) to summon their one specialist (a sub-contractor) to diagnose and hopefully fix the problem.

With the temperature this week dropping below zero the heat pump has started to frost up when it's running. This means that it does a poor job of heating the water but uses a lot of electricity defrosting itself. I've switched DHW off and am using the immersion heater for the duration of the sub zero temperatures. It could actually be cheaper than the heat pump. So that's no UFH, no DHW.

Thankfully we have wood burning stoves to fall back on.

Not quite what the government was thinking of when encouraging us to be prepared.

 

Mike


Grant Aerona HPID10 10kWh ASHP


   
Quote
Forum Jump:
  Previous Topic

Currently viewing this topic 4 users ( Andris, RobS, hml1827, Mike Patrick ) and 5 guests.

Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

Click to access the login or register cheese
Protected By
Shield Security PRO