High-Voltage Heaters
High-voltage heater repairs & replacements
High-voltage heater failure
High-voltage (HV) heaters (often coolant heaters or PTC heaters) are used to heat the cabin and support functions like demisting/defrost and pre-conditioning. When they fail, the vehicle can lose cabin heat entirely, pre-conditioning may stop working, and you may see an “HV heater fault” or wider high-voltage system warnings.
At LKQ Electriq we carry out specialist diagnostics on the HV heater, the heating/coolant circuit, and the vehicle’s control strategy to pinpoint the root cause, then repair or replace the failed heater module/unit and validate correct operation.
Selection of Covered Vehicles - High-Voltage Heater Repairs
View a selection of vehicles that have an High-Voltage Heater repair solution
Audi
- Audi (all plug-ins) 2014-present
- Audi E-Tron 2014-present
Abarth
- Abarth 500e (2023–present)
BMW
- BMW i3 (2013–present)
Citroen
- Citroen Berlingo (2021–present)
- Citroen C4 / C4 X (2020–present)
- Citroen Jumper III (2021–2023)
- Citroen Jumpy III (2020–present)
- Citroen Spacetourer (2020–present)
DS
- DS 3 Crossback (2019–present)
Fiat
- Fiat 500e (2023–present)
- Fiat Doblo (2022–present)
- Fiat Ducato (2020–2023)
- Fiat Scudo (2022–present)
- Fiat Ulysse (2022–present)
Hyundai
- Hyundai Ioniq (2016–2022)
- Hyundai Kona (2018–2023)
Jeep
- Jeep Avenger (2022–present)
Kia
- Kia Niro I (2018–2022)
- Kia Soul II (2014–2018)
- Kia Soul III / e-Soul (2019–present)
Mercedes
- Mercedes B-Class (2014–2017)
Nissan
- Nissan Leaf (2010–present)
- Nissan NV200 / Evalia (2014–present)
- Nissan Townstar (2022–present)
Peugeot
- Peugeot 208 II (2019–present)
- Peugeot 308 III / 308 SW III (2023–present)
- Peugeot 2008 II (2019–present)
- Peugeot Boxer (2021–present)
- Peugeot Expert (2020–present)
- Peugeot Partner (2021–present)
- Peugeot Rifter (2021–present)
- Peugeot Traveller (2020–present)
Renault
- Renault Zoe (2012–present)
Tesla
- Tesla Model S (2012–present)
- Tesla Model X (2015–present)
- Tesla Model Y (2019–present)
- Tesla Model 3 (2017–present)
Toyota
- Toyota RAV 4 III Electric (2012–2014)
Vauxhall
- Vauxhall Astra Mk VIII (2023–present)
- Vauxhall Combo Mk IV (2021–2024)
- Vauxhall Corsa Mk V (2019–present)
- Vauxhall Mokka (2020–present)
- Vauxhall Vivaro C (2023–2024)
Volkswagen
- Volkswagen Crafter (2018–present)
- Volkswagen Golf VII (2014–2021)
- Volkswagen GTE 2014-2020
- Volkswagen Load Up! (2014–2019)
- Volkswagen Up! (2013–present)
Volvo
- Volvo V60 / V60 Cross Country Hybrid (2012–2018)
- Volvo XC90 II Hybrid (2015–2018)
Can't find your vehicle?
The vehicles listed are a selection of High-Voltage Heater Repairs. Please contact us if your vehicle is not listed.
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Case Studies
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Common Symptoms
No warm air from vents
Cabin controls are set to heat, but the air stays cold. This often points to an HV heater/coolant heater not operating.
“HV heater fault” or high-voltage warning
Some vehicles display a specific HV heater warning; others show a more general HV system message.
Poor demist / defrost and no pre-conditioning
Windows don’t clear properly and pre-conditioning may fail or perform poorly in cold temperatures.
Intermittent or weak heating performance
Heating may respond slowly, cut out, or never reach normal cabin temperature — especially in low ambient temperatures.
Vehicles Affected
- This can vary by make/model and model year.
If you’re unsure, contact us with your registration/VIN and symptoms and we’ll advise the best next step.
What's Included?
Specialist HV heater and coolant system diagnostics
We inspect the HV heater and heating/coolant circuit, review heating system performance and status, and assess related components (where applicable).
Root cause identification
We isolate the failure to the specific module/unit or supporting cause (rather than guessing or replacing parts unnecessarily).
Repair or replacement of the heater unit/module
Our first option is always to repair a component where possible. Where replacement is required, we remove and replace the defective heater unit/module and reinstall components to OEM-level standards, using tested recycled OEM parts.
System checks, resets, and commissioning
We check the vehicle’s heating system, high-voltage circuits, and controls, complete any required resets/commissioning in line with specialist EV/Hybrid protocols, and verify correct heating performance (including cabin heat, pre-conditioning, and demist/defrost).
All work is backed by a 12-month warranty covering both parts and labour, giving you peace of mind and confidence in the quality of our service.
I would like to add that I found the set up extremely professional and whoever I engaged with was polite and more than ready to help with my enquiry. A really great independent set up that is desperately required by the general public given the poor support and hideously expensive Main Dealer options available.