
Troubleshooting Guide for Optimyst Water Vapour Fireplaces
Welcome to your comprehensive guide on troubleshooting and resolving the most common issues with Optimyst water vapour fireplaces. These innovative fireplaces are designed to bring warmth and ambience to your space with the added benefit of safety and efficiency.
However, like any sophisticated technology, they may occasionally encounter issues. This guide aims to empower you with the knowledge and confidence to address these challenges effectively.

Understanding Your Optimyst Fireplace
Before diving into troubleshooting, it's essential to understand the basic components of your Optimyst fireplace.
The key elements include:
1. Transducer: Utilizes ultrasonic vibrations to convert water into mist. Depending on the fireplace model, 1-4 transducers may be used. Each transducer has a lifespan of approximately 6-12 months, contingent on usage frequency.
2. Water Tank: Supplies water for the vapour effect. Typically, one refill of the water tank lasts for approximately 8-12 hours of flame effects, ensuring a continuous and captivating ambience.
3. Fan: Distributes the mist and light to simulate flames, ensuring an even and lifelike display.
4. LED Lights: Illuminate the mist to create a realistic flame effect, enhancing the visual appeal of your fireplace.
5. Sponge pill: Small pill that will expand when wet and shut off the water supply to prevent water damage. (Only automatic refill models)

Common Issues and Solutions
Scroll table to the side to see causes and solutions
Issue | Possible Causes | Solutions |
---|---|---|
No Mist or Reduced Mist Output | - Low water level in the tank - Blocked transducer - Faulty fan |
- Check water level and refill with water - Clean the transducer with a mild vinegar solution - Inspect and ensure the fan is operational - Remove the cone cap on the transducer to generate approximately 20% more mist - Replace the transducer if necessary, as it has a lifespan of approximately 6-12 months depending on use |
LED Lights Not Working* | - Burnt-out LED strip - Loose connections |
- Replace LED strip with compatible one - Ensure all electrical connections are secure |
Unusual Noise | - Air trapped in the water tank - Loose components |
- Bleed the tank by refilling it carefully - Tighten any loose components |
Fireplace Not Turning On | - Power supply issues - Faulty remote control |
- Check the power supply and test the outlet - Replace remote batteries and ensure it is within range |
Fireplace Turning Off After Short Period | - Overheating of the burner unit due to insufficient ventilation | - Create more ventilation for cooling to prevent overheating |
Condensation Forming Around Opening | - Insufficient ventilation causing moisture build-up | - Increase ventilation around the fireplace to allow moisture to dissipate |
Optimyst Fireplace with Automatic Refill System Will Not Turn On | - Sponge pill has become wet and expanded to shut off water supply | - The sponge pill is a safety feature in the automatic refill system. Replace the sponge pill with a new one. |
*Older models use halogen light bulbs and not LED strips.
You can see our selection of spare parts for Optimyst electric fireplaces here.
Maintenance Tips
To ensure your Optimyst fireplace continues to operate smoothly, consider the following maintenance tips:
Regular Cleaning: For manually refilled models, it is recommended to clean the transducer and water tank monthly to prevent mineral build-up. In contrast, automatic refilled models benefit from water passing through a filter, which minimizes the need for regular cleaning and maintenance.
Use Distilled Water: While normally filtered tap water is completely fine to use, opting for distilled water can significantly minimize the build-up of mineral deposits and limescale. This choice reduces the frequency of cleaning and helps prolong the life of your fireplace, ensuring it continues to operate at peak performance.
Avoid Stagnant Water: When the fireplace is not in use, avoid leaving still water inside the unit for extended periods. This precaution helps prevent the build-up of Legionella bacteria, ensuring a safe and hygienic environment. Regularly empty and dry the water tank if the fireplace will be unused for a significant time.
When to Seek Professional Help
While many issues can be resolved independently, some situations require professional intervention. If you encounter persistent problems or are unsure about any troubleshooting steps, do not hesitate to contact a certified technician. Professional assistance ensures safety and preserves the integrity of your fireplace.
Conclusion
By understanding the common issues and their solutions, you are well-equipped to maintain and troubleshoot your Dimplex Optimyst fireplace. With regular maintenance and prompt attention to any problems, your fireplace will continue to provide warmth and ambience to your home. Remember, the key to longevity and performance lies in proactive care and timely intervention.
Embrace the warmth and elegance of your Optimyst fireplace with confidence and peace of mind.

Explore all Opti-Myst fireplaces here: bioethanol-fireplace.co.uk/opti-myst