--- title: Operating the Truma water heater in a TrailLite description: This video tutorial will explain how to operate and troubleshoot your Truma water heater control panel --- [Skip to content](https://knowledge.traillite.co.nz/en/knowledge/how-to-operate-truma-water-heater-traillite#main-content) English Show submenu for translations ![TrailLite Group\_Primary\_Gold\_RGB-1.png\]](https://knowledge.traillite.co.nz/hs-fs/hubfs/TrailLite%20Group_Primary_Gold_RGB-1.png?height=40&name=TrailLite%20Group_Primary_Gold_RGB-1.png) - [The TrailLite Blog](https://blog.traillite.co.nz/) Open main navigation Close main navigation - [The TrailLite Blog](https://blog.traillite.co.nz/) - English Show submenu for translations - [Go to www.traillite.co.nz](https://www.traillite.co.nz/) [Go to www.traillite.co.nz](https://www.traillite.co.nz/) Hello. What can we help you with today? - There are no suggestions because the search field is empty. 1. [Help Centre](https://knowledge.traillite.co.nz/en/knowledge?hsLang=en) 2. [TrailLite Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/traillite-information-and-guides?hsLang=en) # Operating the Truma water heater in a TrailLite ## This video tutorial will explain how to operate and troubleshoot your Truma water heater control panel   **What to do if your Truma Gas Boiler won’t light on gas** If a red light appears when you switch the boiler on via the control panel, it means your boiler has gone into fault mode. Follow the troubleshooting steps below to rectify. **![](https://knowledge.traillite.co.nz/hs-fs/hubfs/image-png-Oct-09-2024-11-03-34-5899-PM.png?width=124&height=109&name=image-png-Oct-09-2024-11-03-34-5899-PM.png)** **Step 1. Check vent cover is open.** This could be because the outside vent cover has been left on – ensure this is removed before turning on the boiler. ![](https://knowledge.traillite.co.nz/hs-fs/hubfs/image-png-Oct-09-2024-11-03-22-0786-PM.png?width=261&height=168&name=image-png-Oct-09-2024-11-03-22-0786-PM.png) **Step 2. Check your gas bottles.** It could also be your gas bottle has not been turned on, is running low or completely out of gas. Note: When you swap gas bottles, a good practice is to then light your oven hobs to ensure no air is in the lines. **Step 3. To clear the fault and reset.** - Turn off the control panel - Ensure the above has been done (cover removed and gas bottle checked) - Leave it off for 5 minutes, then turn it back on  - If it doesn’t reset turn the switch on, off, on within 2.5 seconds If it continues to fault, please contact our TrailLite Service Centre. - [General Help and Information](https://knowledge.traillite.co.nz/en/knowledge/general-help-and-information?hsLang=en) - [TrailLite Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/traillite-information-and-guides?hsLang=en) - [Benimar Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/benimar-information-and-guides?hsLang=en) - [Fusion Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/fusion-information-and-guides?hsLang=en) - [Mobilvetta Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/mobilvetta-information-and-guides?hsLang=en#main-content) - [KP model](https://knowledge.traillite.co.nz/en/knowledge/mobilvetta-information-and-guides?hsLang=en#kp-model) - [Both models](https://knowledge.traillite.co.nz/en/knowledge/mobilvetta-information-and-guides?hsLang=en#both-models) [![Chill listening crop-3](https://knowledge.traillite.co.nz/hs-fs/hubfs/TrailLite%20Group_Primary_Gold_RGB-2.png?width=200&height=49&name=TrailLite%20Group_Primary_Gold_RGB-2.png "Chill listening crop-3")](http://traillite.co.nz) Contact our friendly service teams for more information or assistance. Pukekohe: 09 237 0187 | 15 Alpito Place, Pukekohe. Christchurch: 03 222 2067 | 10 Innovation Road, Islington. **Email** - Service [Service@TrailLite.co.nz](mailto:Service@trailLite.co.nz) or Parts [parts@TrailLite.co.nz](mailto:parts@TrailLite.co.n)   Copyright © 2026, TrailLite Group