Heat pump support

1. It adjusts to the weather

Your heat pump automatically responds to outdoor temperatures to maintain comfort indoors.

2. It warms up gradually

Unlike boilers, heat pumps heat slowly. Set schedules ahead of time to ensure warmth when you need it.

3. Hot water takes priority

When heating water, your system temporarily pauses space heating. It’ll resume once your cylinder is full.

4. Don’t turn it off - just turn it down

Keeping it running steadily is more efficient than frequent shutdowns.

5. Keep it clear and clean

Make sure the outdoor unit is free of leaves, snow, or clutter. Wipe it down occasionally with a damp cloth (no chemicals!).

• Stick to a steady temperature
  Avoid cranking up the heat. A consistent target temperature that suits your comfort and budget is more efficient than big changes. Your heat pump will adjust automatically to the weather outside.

Check out this guide for tips on the most affordable ways to run your heat pump.

• Set a schedule
  Turning your heat pump on and off will use more energy than setting a schedule in advance. It’s designed to work efficiently in the background - even when it’s not actively heating.

Hot tip: On a tariff with peak/off-peak rates? Schedule your heating and hot water during cheaper times to cut costs.

Find recommended schedules here.

• Avoid boost mode
  Use it only when truly needed. It’s not the most efficient way to use your system. So it's best to save it for when it’s really needed.
• Use a smart tariff
  A smart tariff like Cosy Octopus helps you use electricity when it’s greenest and cheapest. It’s designed for heat pump users to save money while staying cosy.

Heat pumps run a bit cooler than boilers, so your radiators might feel less toasty than you expect - especially on cooler days.

• Cosy: Make sure radiators are bled, schedules are set correctly, and all thermostatic radiator valves are left open.
• Daikin: Bleed your radiators first.

If rooms are still chilly, just submit a support request and we'll help.

Cosy hub lights are your window into what your system is up to - think of them as little status updates in light form.

• Cosy: Check the Get to Know Your Cosy PDF for full details.
• Daikin: No hub lights here, so nothing to worry about.

A little gurgle or pop is normal. Loud clunks of constant bubbling? Not so much.

• Try bleeding radiators first to get rid of trapped air (how to bleed a radiator).
  
• Still noisy? Raise a support request and we'll take a closer look.

Water should flow freely from below your heat pump.

• Check the drip tray outlet for debris or ice.
• Spot a puddle or ongoing leak? Contact us straight away - don’t try to fix it yourself. Safety first!

It’s normal for system pressure to drop over time - usually about once a year you might need to top-up.

• If pressure keeps dropping or stays low after a top-up, submit a support request.

• Cosy: Changed broadband? You’ll need a new connection card - just submit a support request and we’ll get one sent to you.
• Daikin: Follow the guide to reconnect your unit to Wi-Fi and make sure your tank is set to Hot Water, Operation: ON.

Double-check your hot water timings (Cosy: Cosy schedule guide.). If it’s still not heating, just submit a support request and we’ll help.

Moving thermostats or placing them somewhere sunny, draughty, or near a radiator can confuse them.

• Keep them in their installed spots.
• If readings still feel off, contact us and we’ll help.

• First, check if the rest of your home has power.
• Inspect fuses or circuit breakers if everything else is fine.
• If the unit still won’t turn on, submit a support request- we’ve got you covered.

Your system might heat water to around 60°C now and then for hygiene. Totally normal - no action needed!