Getting the Epson Workforce Pro Wf 3720 to work properly
The Epson Workforce Pro WF-3720 is a decent business-oriented inkjet printer, but it has its share of quirks that the official documentation doesn't always cover in detail. Most people looking for the manual just want to set it up, configure duplex printing, or troubleshoot a paper jam. I'll cover all of that and throw in a few things I've learned the hard way over the years. The official manual is available free from Epson's support site. You can download the complete user guide as a PDF, along with the quick start guide and the administration manual if you need the network configuration details. Go to support.epson.com and search for "WF-3720" — there's a downloads section with all the documentation. The full manual is roughly 200 pages and covers setup, troubleshooting, maintenance, and network configuration. Sometimes Epson reorganizes their website and moves files around. If you can't find it after a Google search, try using the direct URL pattern: support.epson.com/download/manual.php?m=wf3720&r=doc. That usually works even when the site navigation is confusing. There are also PDF versions floating around on third-party sites, but the Epson official one is the most current and includes any errata they've published.
Installation and setup that actually works
The quickest path to getting this printer running is using the CD driver installer if you have one, or downloading the full software package from Epson's site. The driver-only install often leaves out the scanning utility and printer management tools. Install the full package — it's called "Epson Software Updater" or "Epson Toolbox" depending on your OS — because those tools handle the ink level monitoring and nozzle checks. For network setup, connect the printer via Ethernet if at all possible. The wireless setup is fine but tends to be finicky on 5GHz networks. This printer only supports 2.4GHz Wi-Fi, which many modern routers handle poorly by default since they push everything to 5GHz. If your router lets you configure separate SSIDs for 2.4 and 5GHz, name the 2.4GHz one something distinct and connect the printer to that. Flat-rate IP addressing is essential — don't rely on DHCP for a network printer if you can avoid it, especially in an office environment where IP conflicts will drive you crazy.
Duplex printing configuration
This printer has automatic duplex (double-sided printing). The driver defaults sometimes don't include duplex as the default setting, which means you'll end up printing single-sided until you go into printer preferences and set it manually. Here's how: go to your operating system's printer settings, find the WF-3720, click "Preferences" or "Printing Preferences," and look for a layout orFinishing tab. Set "2-Sided" to "Long Edge" for portrait documents or "Short Edge" for landscape. Save that as the default so you're not changing it every time. One thing the manual buries: if you're printing from certain applications like Adobe Reader, the duplex setting sometimes gets overridden by the application's own print dialog. You have to set it in both places. It's annoying but you'll figure it out after doing it a few times.
Get the Full Details
Common problems and workarounds
I ran into a persistent issue where the printer would report a "white cartridge" error after replacing just the black ink cartridge. The printer refused to print because it thought all cartridges were empty, even though I'd just popped in a fresh one. The manual tells you to remove and reinsert the cartridges, which I did multiple times. What actually fixed it was powering the printer off completely, unplug- ging it for about 30 seconds, and then plugging it back in. The printer does a full initialization on boot and recalibrates the cartridge contacts. Just a partial power cycle (turning it off and on without unplugging) doesn't clear the error state. Another issue that comes up frequently: the printer prints faint or streaky pages even with full ink. This is almost always a clogged printhead. Run the nozzle check pattern from the printer's control panel — press the home button, navigate to Setup, then Maintenance, then Nozzle Check. If there are gaps in any color, run the printhead cleaning cycle. Do not run more than two cleaning cycles in a row. Epson explicitly warns about this in the manual, and for good reason: each cleaning cycle uses a significant amount of ink, and running too many in succession can damage the waste ink absorber or waste ink pad prematurely. If one cleaning cycle doesn't fix it, wait a few hours and try again. Sometimes the ink just needs time to dissolve the clog. Paper jams are another frequent complaint, especially with thinner or lower-weight paper. This printer feeds from the bottom tray by default, and the paper path has several rollers that can slip on light stock. If you're regularly printing on 20lb or lighter paper, you'll want to adjust the paper thickness setting in the driver. Go to printer preferences, click "Advanced," and look for a "Paper Type" or "Media Type" setting. Switch it from "Plain Paper" to "Thin Paper" or even "Bond" depending on your paper weight. It changes the feed speed and roller pressure. Without this adjustment, you'll get more jams than necessary.
Maintenance schedule
The printer tracks usage through the management counter. Every 10,000 pages or so, it recommends replacing the waste ink pad. This is a physical pad inside the printer that absorbs excess ink from the cleaning cycles. When it's full, the printer will eventually shut down and display a maintenance request error. You can buy a replacement kit online for around $20–$30. The process involves opening the front cover, removing the old pad, and installing the new one. It's not complicated, but it requires some patience and a Phillips screwdriver. After replacing the pad, you need to reset the counter through the administration menu, or the error will persist even with a fresh pad. The manual has instructions for this in the troubleshooting section, but they're not particularly detailed — you may need to watch a YouTube video for a visual guide if you've never done it before. Keep the firmware updated. Epson periodically releases firmware updates that fix bugs and sometimes improve print quality or connectivity. Check the downloads page occasionally. For Windows users, the Universal Print Driver is a good option if you need to deploy this printer across multiple machines with different OS versions. It handles both Windows and macOS installations and supports the basic functions without the full software suite taking up disk space. On macOS, note that Epson's print driver support sometimes lags behind new OS releases. If you just upgraded to a newer version of macOS and your printer stops working, don't immediately assume the printer is broken. Check if Epson has released a compatible driver for that OS version. If not, you can use AirPrint, which works adequately for basic printing but won't give you access to the advanced features like duplex control or borderless printing.
Limitations worth knowing upfront
This printer is not fast. The maximum print speed is about 33 pages per minute for black and around 15 pages per minute for color. In practice, expect something closer to 20–25 ppm for mixed documents because of the overhead from color processing and driver communication. If you're printing large volumes regularly, this printer will feel slow compared to a laser printer. The ink cartridges are not high-yield in the way that toner cartridges are on laser printers. Standard cartridges print roughly 400–500 pages for black and 300–400 for color at 5% coverage. Epson does sell high-yield cartridges (T7742 series), which double that, but the cost per page is still higher than a comparable laser. For a home office doing moderate printing, this is manageable. For a busy office, the ongoing ink costs add up quickly. The scanner bed is flatbed-only. There's no automatic document feeder, which means you can't batch-scan multi-page documents. If scanning is a regular part of your workflow, this is a significant limitation compared to multifunction printers that include an ADF. You'll be feeding pages one at a time.
Wireless connectivity is reliable but not as robust as wired Ethernet. If you're having intermittent printing issues over Wi-Fi, switch to a cable connection and see if the problem resolves. Many so-called "printer problems" are actually network connectivity problems in disguise. The Epson Workforce Pro Wf 3720 Manual is thorough enough for most situations, but the real learning happens when you hit the edge cases. The nozzle check routine, the paper thickness adjustment, and the waste ink pad replacement are the three things that will save you the most frustration. Everything else is standard printer operation. If you have a specific problem that isn't covered here, the Epson community forums are decent for finding workarounds that the manual doesn't mention.
