Identify what heating system you have

This is for complete beginners. We’ll walk you through what to look for (radiators, hot water tank, outdoor unit, ground loop), then help you find the manufacturer and model number on the label.

No tools needed Plain English Find the data plate

Step 1 — Quick checks (what can you see in your home?)

Pick what you definitely have. Don’t worry if you’re unsure — just choose the things you can recognise.

Helpful tip: If you’re stuck, start with these two questions:
  • Do you have radiators or underfloor heating?
  • Do you have an outdoor unit that looks a bit like an air conditioner (a fan in a box)?

Step 2 — Your most likely system type

Based on what you selected, here are the most likely options. Choose the one that matches best.

Not sure? Use these quick clues:
  • Air-to-water heat pump: outdoor unit + radiators/UFH + usually a hot water cylinder.
  • Ground source heat pump: no big outdoor fan unit; pipes go into the ground (loop/borehole).
  • Air-to-air (air conditioning): indoor units blow warm/cool air (often wall-mounted).
  • Hybrid: heat pump + boiler working together (often one box outside + a boiler indoors).

Step 3 — Find the manufacturer + model number

You’re looking for a data plate / rating label (a sticker or metal plate). It usually includes: Manufacturer, Model (or “Model No.”), and Serial.

Where to look:

Model vs Serial (common mistake)
  • Model = the type of unit (letters + numbers). This is what we need.
  • Serial = unique to your exact unit. Nice to have, but not required for error code pages.
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If you don’t know the brand, skip this and just type it from the label.

Result

Copy this. It’s a tidy summary you can use when searching manuals, contacting support, or using the error code pages.

System type

—

—

Manufacturer

—

From the data plate label

Model number

—

Not the serial
—

Next: go to /heat-pump-error-codes and search by manufacturer + model.

Go to error codes

Site owner note: you can add logo URLs for the manufacturer tiles in the script. This page does not try to list all models.