HVAC brands
Find the name on the indoor or outdoor unit. Each hub carries the references published for that manufacturer, with the product family stated on every technical page, because a code table belongs to a series rather than to a badge.
United States
Manufacturers commonly installed across North America, including the ductless specialists sold through online and contractor channels.
Gree
Source-scoped diagnostics for Gree ductless systems, heat pumps, controls, and documented fault codes.
Daikin
Manual-led Daikin references for ductless, multi-split, SkyAir, and heat-pump operating faults.
Mitsubishi Electric
A growing index for Mitsubishi Electric ductless and heat-pump documentation, controls, and symptoms.
Midea
Product-family-specific Midea error-code and operating guidance grounded in manufacturer documentation.
MRCOOL
Generation-aware MRCOOL mini-split code references with clear homeowner and technician boundaries.
Fujitsu General
Operating and troubleshooting references for Fujitsu General AIRSTAGE and legacy ductless systems.
Pioneer
Series-qualified Pioneer error-code guidance that avoids treating one code as universal across products.
Senville
Official-support-based Senville LETO and AURA fault references, maintenance, and operating checks.
LG
LG ductless system diagnostics linked to official service literature and precise code context.
Samsung
An evidence-first directory for Samsung residential and light-commercial HVAC documentation and codes.
Panasonic
Panasonic ductless, Aquarea heat-pump, and ventilation references for United States, United Kingdom, and European systems.
Toshiba
Toshiba residential and light-commercial air conditioning references, including Carrier-partnered product lines.
Mitsubishi Heavy Industries
Mitsubishi Heavy Industries Thermal Systems references, a separate manufacturer from Mitsubishi Electric with its own code tables.
Haier
Haier ductless and heat-pump references covering systems sold directly and through partner brands.
Hisense
Hisense residential air conditioning and heat-pump references for North American and European markets.
TCL
TCL air conditioning references for ductless systems sold across North America and Europe.
Cooper & Hunter
Cooper & Hunter ductless references for the single-zone and multi-zone systems widely installed in North America.
Della
Della mini-split references covering the value-segment ductless systems sold through North American retail channels.
Klimaire
Klimaire ductless and ducted references for the North American residential and light-commercial market.
Blueridge
Blueridge ductless and universal-air-handler references for contractor-installed North American systems.
Friedrich
Friedrich ductless, packaged terminal, and room air conditioning references for North American installations.
Carrier
Carrier references spanning ducted central systems, heat pumps, and the ductless lines sold under the Carrier name.
Trane
Trane heating and cooling references for ducted systems, heat pumps, and Trane-badged ductless equipment.
American Standard
American Standard heating and air conditioning references for the ducted and heat-pump systems shared with the Trane platform.
Lennox
Lennox references covering ducted systems, variable-capacity heat pumps, and the MLA and MPA ductless lines.
Rheem
Rheem references for heat pumps, air conditioners, furnaces, and water heating equipment installed across North America.
Ruud
Ruud references for the heating and cooling equipment built on shared platforms with Rheem product lines.
Goodman
Goodman references for the ducted air conditioners, heat pumps, and furnaces widely installed in North American homes.
Amana
Amana heating and cooling references for ducted systems and packaged terminal equipment sold in North America.
York
York references for residential and light-commercial heating, cooling, and heat-pump equipment.
Bryant
Bryant heating and cooling references for the ducted and heat-pump systems built on shared Carrier platforms.
Bosch
Bosch Home Comfort references for inverter ducted systems, ductless equipment, and European heat-pump ranges.
GE Appliances
GE Appliances references for ductless systems, packaged terminal units, and room air conditioning equipment.
United Kingdom
Brands you meet in British homes: air-source heat pumps, combi and system boilers, and the controls that sit between them.
Daikin
Manual-led Daikin references for ductless, multi-split, SkyAir, and heat-pump operating faults.
Mitsubishi Electric
A growing index for Mitsubishi Electric ductless and heat-pump documentation, controls, and symptoms.
Midea
Product-family-specific Midea error-code and operating guidance grounded in manufacturer documentation.
Fujitsu General
Operating and troubleshooting references for Fujitsu General AIRSTAGE and legacy ductless systems.
LG
LG ductless system diagnostics linked to official service literature and precise code context.
Samsung
An evidence-first directory for Samsung residential and light-commercial HVAC documentation and codes.
Panasonic
Panasonic ductless, Aquarea heat-pump, and ventilation references for United States, United Kingdom, and European systems.
Toshiba
Toshiba residential and light-commercial air conditioning references, including Carrier-partnered product lines.
Hitachi
Hitachi air conditioning and Yutaki heat-pump references for United Kingdom and European installations.
Mitsubishi Heavy Industries
Mitsubishi Heavy Industries Thermal Systems references, a separate manufacturer from Mitsubishi Electric with its own code tables.
Haier
Haier ductless and heat-pump references covering systems sold directly and through partner brands.
Carrier
Carrier references spanning ducted central systems, heat pumps, and the ductless lines sold under the Carrier name.
Trane
Trane heating and cooling references for ducted systems, heat pumps, and Trane-badged ductless equipment.
Bosch
Bosch Home Comfort references for inverter ducted systems, ductless equipment, and European heat-pump ranges.
Vaillant
Vaillant references for aroTHERM air-source heat pumps, ecoTEC boilers, and the controls that sit between them.
Viessmann
Viessmann references for Vitocal heat pumps, Vitodens boilers, and ViCare system controls.
Worcester Bosch
Worcester Bosch references for Greenstar boilers and the heat-pump ranges installed across United Kingdom homes.
Baxi
Baxi references for domestic boilers, Assure air-source heat pumps, and United Kingdom heating controls.
Ideal Heating
Ideal Heating references for Logic and Vogue boilers plus the Logic Air heat-pump range.
Grant
Grant references for Aerona air-source heat pumps and the oil-fired heating equipment common in rural United Kingdom and Ireland.
NIBE
NIBE references for air-source and ground-source heat pumps installed across Northern Europe and the United Kingdom.
Stiebel Eltron
Stiebel Eltron references for heat pumps, ventilation, and electric water heating in European and United Kingdom installations.
Ariston
Ariston references for Nimbus heat pumps, domestic boilers, and hot water equipment sold across Europe.
Daikin Altherma
Focused references for the Daikin Altherma hydronic heat-pump range used in United Kingdom and European retrofits.
Europe
Manufacturers with strong presence across mainland Europe, including hydronic heat pumps and mainstream split systems.
Gree
Source-scoped diagnostics for Gree ductless systems, heat pumps, controls, and documented fault codes.
Daikin
Manual-led Daikin references for ductless, multi-split, SkyAir, and heat-pump operating faults.
Mitsubishi Electric
A growing index for Mitsubishi Electric ductless and heat-pump documentation, controls, and symptoms.
Midea
Product-family-specific Midea error-code and operating guidance grounded in manufacturer documentation.
Fujitsu General
Operating and troubleshooting references for Fujitsu General AIRSTAGE and legacy ductless systems.
LG
LG ductless system diagnostics linked to official service literature and precise code context.
Samsung
An evidence-first directory for Samsung residential and light-commercial HVAC documentation and codes.
Panasonic
Panasonic ductless, Aquarea heat-pump, and ventilation references for United States, United Kingdom, and European systems.
Toshiba
Toshiba residential and light-commercial air conditioning references, including Carrier-partnered product lines.
Hitachi
Hitachi air conditioning and Yutaki heat-pump references for United Kingdom and European installations.
Mitsubishi Heavy Industries
Mitsubishi Heavy Industries Thermal Systems references, a separate manufacturer from Mitsubishi Electric with its own code tables.
Haier
Haier ductless and heat-pump references covering systems sold directly and through partner brands.
Hisense
Hisense residential air conditioning and heat-pump references for North American and European markets.
TCL
TCL air conditioning references for ductless systems sold across North America and Europe.
Carrier
Carrier references spanning ducted central systems, heat pumps, and the ductless lines sold under the Carrier name.
Trane
Trane heating and cooling references for ducted systems, heat pumps, and Trane-badged ductless equipment.
Lennox
Lennox references covering ducted systems, variable-capacity heat pumps, and the MLA and MPA ductless lines.
York
York references for residential and light-commercial heating, cooling, and heat-pump equipment.
Bosch
Bosch Home Comfort references for inverter ducted systems, ductless equipment, and European heat-pump ranges.
Vaillant
Vaillant references for aroTHERM air-source heat pumps, ecoTEC boilers, and the controls that sit between them.
Viessmann
Viessmann references for Vitocal heat pumps, Vitodens boilers, and ViCare system controls.
Baxi
Baxi references for domestic boilers, Assure air-source heat pumps, and United Kingdom heating controls.
NIBE
NIBE references for air-source and ground-source heat pumps installed across Northern Europe and the United Kingdom.
Stiebel Eltron
Stiebel Eltron references for heat pumps, ventilation, and electric water heating in European and United Kingdom installations.
Ariston
Ariston references for Nimbus heat pumps, domestic boilers, and hot water equipment sold across Europe.
Daikin Altherma
Focused references for the Daikin Altherma hydronic heat-pump range used in United Kingdom and European retrofits.
Thermostats and controls
Control faults look like equipment faults from the room. These hubs cover wiring requirements, pairing, and the messages controls show when the problem is upstream.
Google Nest
Nest thermostat references covering wiring compatibility, heat-pump control, and the behaviour that owners most often question.
ecobee
ecobee thermostat references for heat-pump staging, accessory wiring, and sensor behaviour in North American homes.
Honeywell Home
Honeywell Home and Resideo control references covering thermostats, zoning panels, and system accessories.
tado
tado control references for European and United Kingdom heating systems, including heat-pump and boiler integrations.
Hive
Hive control references for United Kingdom heating systems, covering receiver wiring, scheduling, and connection faults.
Drayton
Drayton control references for Wiser and traditional United Kingdom heating controls and zoning components.
Cannot find your brand?
Many systems are built on shared platforms and sold under several names, so the code table that matches your unit may sit under a different manufacturer. Search by the code itself, or send us the model number from the data plate and we will tell you which documentation applies.