# Chamber Heater SV08 Max not working **URL:** \ **Category:** Sovol SV08 MAX\ **Created:** [December 9, 2025, 2:35am UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150 "2025-12-09T02:35:42Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Wolf](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/wolf/32/5074_2.png) [@Wolf](https://forum.sovol3d.com/u/Wolf)\ **Post date:** [December 9, 2025, 2:35am UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/1 "2025-12-09T02:35:42Z")
I got the chamber heater and installed it. It doesn’t seem to work for me. When I plug it in, the red on/off switch is not lighting up. Is that expected? ---
**Author:** ![Lion](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/lion/32/5586_2.png) [@Lion](https://forum.sovol3d.com/u/Lion)\ **Post date:** [December 9, 2025, 4:18am UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/2 "2025-12-09T04:18:49Z")
The chamber heater for the Max was released before the Zero chamber heater… I see no mention of the light in the Max Manual, but it is mentioned in the Zero Manual. ![Clipboard_12-08-2025_01](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/b/ba2cfa11edcd0b7b7c84a41ff786a8ecbfb15e68.jpeg) ---
**Author:** ![Wolf](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/wolf/32/5074_2.png) [@Wolf](https://forum.sovol3d.com/u/Wolf)\ **Post date:** [December 9, 2025, 4:43am UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/3 "2025-12-09T04:43:09Z")
But then how would I know it is powered? It doesn’t seem to give me any indication. I can switch on and off and nothing indicates it is on or off. When I try to switch it on in printer.cfg it doesn’t seem to be recognized. What is a good way to debug this situation? ---
**Author:** ![Lion](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/lion/32/5586_2.png) [@Lion](https://forum.sovol3d.com/u/Lion)\ **Post date:** [December 9, 2025, 5:34am UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/4 "2025-12-09T05:34:26Z")
If you’ve done everything right, all you should have to do is set the number in Blue & the fan should come on. Set the Target higher then the Current. ![Capture](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/a/a18d19db2e199edceb3ca27f7e7fb5088f7a1f27.jpeg) ---
**Author:** ![Wolf](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/wolf/32/5074_2.png) [@Wolf](https://forum.sovol3d.com/u/Wolf)\ **Post date:** [December 9, 2025, 2:22pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/5 "2025-12-09T14:22:29Z")
Unfortunately I don’t get that far. Just uncommenting the line in printer.cfg doesn’t work. I suspect the heater not working … but how can I verify that it works or doesn’t? Is there a fuse in the heater? Maybe that is blown? ---
**Author:** ![mich0111](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/mich0111/32/1176_2.png) [@mich0111](https://forum.sovol3d.com/u/mich0111)\ **Post date:** [December 9, 2025, 4:04pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/6 "2025-12-09T16:04:50Z")
Hi, Email to [info@sovol3d.com](mailto:info@sovol3d.com) with your order number and a description of your issue. They’ll back to you within a week. ---
**Author:** ![Wolf](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/wolf/32/5074_2.png) [@Wolf](https://forum.sovol3d.com/u/Wolf)\ **Post date:** [December 9, 2025, 6:06pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/7 "2025-12-09T18:06:11Z")
Thank you! I will email them. ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\ **Post date:** [December 9, 2025, 6:49pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/8 "2025-12-09T18:49:36Z")
I see the Max chamber has a separate mains cord. ![sovol-sv08-max-chamber-heating-module-kit-front](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/3/3b4912f6ef9a68c929e7b6e9cb902e947ff7918c.jpeg) Yes there is a fuse under a snap in cover right next to the plug receptacle. Is the plug at the heater end fully seated? Try swapping it with the printer cable? Will the printer power up using the cord that shipped with the heater? ---
**Author:** ![Wolf](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/wolf/32/5074_2.png) [@Wolf](https://forum.sovol3d.com/u/Wolf)\ **Post date:** [December 9, 2025, 8:11pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/9 "2025-12-09T20:11:14Z")
Good points … I will try those. ---
**Author:** ![tiffanywalker](https://avatars.discourse-cdn.com/v4/letter/t/858c86/32.png) [@tiffanywalker](https://forum.sovol3d.com/u/tiffanywalker)\ **Post date:** [December 11, 2025, 9:56am UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/10 "2025-12-11T09:56:20Z")
No, the switch should light up. If it still doesn’t, then the heater should not be receiving power. Try checking the plug, fuse, and switch connections again. If everything works and the indicator still doesn’t light up, then it’s more likely that the device is faulty. ---
**Author:** ![PeteMax](https://avatars.discourse-cdn.com/v4/letter/p/b5e925/32.png) [@PeteMax](https://forum.sovol3d.com/u/PeteMax)\ **Post date:** [December 14, 2025, 9:45pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/11 "2025-12-14T21:45:51Z")
Any news on the issue? I have the same problem. Power switch doesn’t light up and heater is not working. Should the power switch light up as soon as the heater is switched on, even when the printer is off? Would make troubleshooting easier. Is the chamber heater line in the mainsail UI only showing when the heater is powered on? I don’t see it but then should show up if I get the power issue fixed. ---
**Author:** ![Wolf](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/wolf/32/5074_2.png) [@Wolf](https://forum.sovol3d.com/u/Wolf)\ **Post date:** [December 14, 2025, 10:47pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/12 "2025-12-14T22:47:13Z")
Still waiting for the next reply from SOVOL. I checked the fuse and double checked that no light is on … I also used a different power supply cable just in case. ---
**Author:** ![Lion](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/lion/32/5586_2.png) [@Lion](https://forum.sovol3d.com/u/Lion)\ **Post date:** [December 14, 2025, 11:24pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/13 "2025-12-14T23:24:06Z")
@sovol3d ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\ **Post date:** [December 15, 2025, 12:14am UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/14 "2025-12-15T00:14:17Z")
How many wires are in the CAN harness? The heater has it’s own MCU and should cause a “cannot connect” fault if it is not powered up (and [include chamber\_hot.cfg] is un-commented) It is likely powered by the mainboard as that would eliminate the need for a 5V supply in the heater. ---
**Author:** ![PeteMax](https://avatars.discourse-cdn.com/v4/letter/p/b5e925/32.png) [@PeteMax](https://forum.sovol3d.com/u/PeteMax)\ **Post date:** [December 15, 2025, 7:18am UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/15 "2025-12-15T07:18:49Z")
I’m still unsure whether the power switch should light when switched on. The identical looking switch on the Max is not lighting either when switched on and the printer is working. ---
**Author:** ![PeteMax](https://avatars.discourse-cdn.com/v4/letter/p/b5e925/32.png) [@PeteMax](https://forum.sovol3d.com/u/PeteMax)\ **Post date:** [December 15, 2025, 4:17pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/16 "2025-12-15T16:17:03Z")
I have to admit the issue with my chamber heater was an user error. Because the printer is in the garage due to its size I‘ve had used my iPhone to edit printer.cfg. Today I’ve checked the file again this time from my Mac and to my surprise printer.cfg still had the line that enables the heater disabled (# in front). I‘ve changed it and chose save and reboot and immediately the chamber heater became available in the mainsail UI. Walked to the garage and the heater was working. And I now can confirm there is no light in the power switch both on the chamber heater and the printer. ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\ **Post date:** [December 15, 2025, 11:37pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/17 "2025-12-15T23:37:50Z")
Is it time for an upgrade? > **[DMWD 3Pins Inlet Power Male Socket 10A 250VAC with 2Pins ON Off Rocker Switch...](https://www.amazon.com/Inlet-Male-Power-Socket-Switch/dp/B0DZMWY51H)** > > DMWD 3Pins Inlet Power Male Socket 10A 250VAC with 2Pins ON Off Rocker Switch Flange Mount Design IEC 320 C14 2 Pieces - Amazon.com be sure to select “red lighted” not the black. ---
**Author:** ![Lion](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/lion/32/5586_2.png) [@Lion](https://forum.sovol3d.com/u/Lion)\ **Post date:** [December 17, 2025, 12:55pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/18 "2025-12-17T12:55:10Z")
[![](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/e/e9cee20068b375e135fc94a2eb1a960767aafd6d.jpeg "Installation Guide Video of SV08 Max Auxiliary Heating Module") ](https://www.youtube.com/watch?v=WvtPUMAyTUU) ---
**Author:** ![Wolf](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/wolf/32/5074_2.png) [@Wolf](https://forum.sovol3d.com/u/Wolf)\ **Post date:** [December 20, 2025, 9:14pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/19 "2025-12-20T21:14:02Z")
Ok. I found the problem. It was my fault. Turns out you can connect the “Communication cable 1” leading to the mainboard incorrectly. You must carefully examine where the latch fastens. Just did that and now it works 🙂 The installation video doesn’t show the challenge here … ---
**Author:** ![Lion](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/lion/32/5586_2.png) [@Lion](https://forum.sovol3d.com/u/Lion)\ **Post date:** [December 20, 2025, 10:23pm UTC](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150/20 "2025-12-20T22:23:07Z")
User errors are fun aren’t they 😁 [Next page](https://forum.sovol3d.com/t/chamber-heater-sv08-max-not-working/9150.md?page=2)