We Fix Our Air Source Heat Pump’s Flow Fault By Cleaning The Filter

by Mars

Our air source heat pump recently went into standby mode for two consecutive nights, during which time it refused to heat the house or hot water in order to prevent any damage to the system. We were able to diagnose the issue with Global Energy Systems, and narrowed the issue down to the fact that the flow and return filter was blocked.

We cleaned the filter on our 18kW Caernarfon air source heat pump in order to restore and maintain a flow rate of around 25 litres per minute. As a result of the blockage, our flow had dropped below 15 litres per minute, which prompted the pump to go into standby mode.

Disclaimer: What we show in the video is how we cleared the blockage in the filter of our air source heat pump in order to get it back up and running after having consulted with an engineer at Global Energy Systems. We do not recommend undertaking this work yourself and would suggest calling your installer, manufacturer or trained engineer to assist if you have a similar issue or if your pump is not functioning as it should. You must make your own judgements on any action you carry out after watching the video, but if you decide to clean the filter yourself on your air source heat pump, we will not be liable for any resulting injuries or damage to the air source heat pump system, nor will we accept any liability arising out of incomplete or incorrect information. If in doubt, please call an air source heat pump professional.

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anna mycoe
anna mycoe
1 year ago

Hi there
We have had an ASHP installed on the 11th Jan,
It was -6 for two nights concurrently almost immediately after the install. It was cold, as it took a few days for the glycol to mix in the system. We replaced a 30 year old oil guzzler. I’ve found so far that I need to leave the night temp at around 18 so that it can reach 21 during the peak times when we are in (almost 100% of the day during lockdown)
Butter hot water had been excellent, no issues at all once I have set the schedule to suit us. My husband finds it cooler, but then he likes to sit in his shorts and tee shirt of an evening. The house is a really old cottage, with some modern ish extensions and the insulation isn’t superb but we are working on that as we renovate. We’ve been here 18 months and wanted an alternative to the noisy smelly oil boiler and want the space the tank used. We’re hopeful that we’ve made the right choice ! Ours is a Grant, 14Kw I believe. What’s the best way to monitor the electricity consumption?
Thanks
Anna

anna mycoe
anna mycoe
Reply to  Mars
1 year ago

Thanks Mars

So far I’m very impressed with the unit, I’ll see how I feel after a year and some bills to compare. However tbh, as long as it’s not more expensive to run than the old oil system I’ll be happy, it was more about energy efficiency, space saving and having little options as we do not live on the gas network. I’ll try the 20 degrees setting, thanks
Anna

Name
Reply to  anna mycoe
1 year ago

Anna, buy and install an electric meter for the pump , like the one you might have on the whole house, as a simple solution.
https://www.cef.co.uk/catalogue/categories/electricity-meters-electricity-panel-meters

anna+mycoe
anna+mycoe
Reply to  Name
1 year ago

Great idea ! And simple too, didn’t occur to me.
Am looking at solar panels and batteries now too
Anyone have any input ??

Thanks
Anna

anna+mycoe
anna+mycoe
1 year ago

Great thanks will do ! Had two quotes so far very similar, we want battery storage too for the summer months. I’ll check the data out
Thanks
Ax

anna+mycoe
anna+mycoe
Reply to  Mars
1 year ago

Hiya, 3.5 – 3.8 Kw had quotes for 11 & 12 panels and a 4.8 battery roughly give or take

anna+mycoe
anna+mycoe
Reply to  Mars
1 year ago

Well, things have moved on a pace since then. We’re exploring a small wind turbine instead, we live on the foot of the moors here, small plot just over an acre. So we’re not always blessed with long days of sunshine, but there is always a breeze, even in the dark ! I’ll keep you updated
Ax

Adam Stanley
6 months ago

I’m not actually a DIY lover guy but after reading your post, I just got the courage to do small fixing and maintenance work by myself and for the first time I have cleaned my air source heat pump today with some help from my cousin who is a HAVC professional. Congrats to me!!! and Thanks to you for sharing this nice post and video with us.

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