Procolored L805 / Panda A4 DTF Printer: Why the Heater Stays On After You Turn the Printer Off

Question

I watched your video about the Procolored Panda A4 DTF printer. I bought a refurbished Procolored L805 A4 DTF printer, and it runs well-but when I turn the printer power off, the heat stays on. Why does the heater stay on even when the printer is turned off?

Answer

Why the heater stays on even after the printer is "off"

On many Procolored A4 DTF setups built around Epson-style platforms (like the L805/Panda A4 style), the heater system is often electrically independent from the printer's main power logic.

In practical terms, that means:

• The printer's main power switch may turn off the printer electronics (carriage, mainboard logic, printing functions), but the heater can still receive power if it has its own controller and power source.

• The heater is typically controlled by a separate temperature controller on the front panel, not by whether the printer is actively printing or even whether the printer itself is turned on.

So your observation usually isn't a "printer malfunction"-it's often simply how the machine is designed:
The heat control is on the front panel, and it is not automatically controlled by print activity or the printer's power state.

What to look for on the machine (most common layout)

On many of these refurbished A4 DTF units, you'll typically see:

• A front-panel heat controller (often a digital temperature display with up/down buttons)

• A heater power switch or toggle that is separate from the printer's power

• Sometimes the heater is plugged into a different internal power circuit or even a different external plug

If the front panel heat controller is still powered, it will continue heating to maintain the set temperature until:

• the heater controller is turned off,

• the heater switch is turned off,

• or the machine is unplugged (depending on how the wiring is set up).

Is it normal-and is it safe?

It can be normal for this style of DTF build, but whether it is safe for your exact unit depends on how Procolored refurbished and wired it.

A few safety-minded notes:

• If the heater is staying on unintentionally, make sure you know where the heater power switch is located (if your unit has one).

• Many heaters are meant to be shut down manually after use. Leaving heat on unattended can be a risk (film warping, heat damage, or just unnecessary wear).

• If your unit has only one main power switch and the heater truly remains on no matter what, it may be wired to constant line power-meaning the only true "off" is unplugging. That's not unheard of in some builds, but it's something you should be aware of.

What you can do immediately

Because your printer is functioning normally otherwise, the most likely solution is simply operational:

• Use the front-panel heater control to turn the heater off (or set it down) when you're done.

• If there is a dedicated heater switch, turn that off separately.

• If your specific refurbished unit has the heater tied to constant power, the most reliable way to ensure it's off is to power down the heater controller and/or unplug the unit, following Procolored's recommended shutdown procedure.

If you want, compare what you see on your machine to the general layout discussed in the video: The Ultimate Uncasing & Review of the Procolored Panda A4 DTF Printer (https://www.youtube.com/watch?v=mLqbe5zKKrA)

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems, especially with DTF machines where the printer mechanism and heater assembly may be separate systems with separate controls. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We do offer an in-person evaluation and repair service via our local diagnostic facility: Printer Repair Service (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis, so it might take a few weeks before we can get your printer in for drop-off. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed. However, we acknowledge that our rates aren't the most economical. Thus, we highly recommend that you resort to self-help via online research. You can start by checking out YouTube or visiting our YouTube channel's homepage BCH Technologies on YouTube (https://youtube.com/@bchtechnologies). Look for specific videos using the search icon next to "About" on the right-hand side of the menu bar. I receive dozens of queries every day asking about videos for specific topics. Having created videos over the past nine years, it's challenging to remember every single one. Therefore, using YouTube's search function would be most efficient. Plus, YouTube might suggest relevant videos from other channels that could assist you.

Thanks again for reaching out and for watching our content. I'm glad to hear the printer is running well overall, and I hope this clears up why the heater can stay on even when the printer itself is powered down.