iFixit - Answers With Device "Keurig K40"

Keurig K40: Why are all of the lights blinking on the Keurig?

Sat, 20 Dec 2025 08:28:38 -0700

When I turn the Keurig on, all of the indication lights are on and blinking. The Keurig will not produce any coffee when these lights are on.

⟐ Commented December 20, 2025 at 8:28 MST

Keurig K40: Dispenses less water than used to into drink

Mon, 17 May 2021 20:34:01 -0700

Get the amount of expresso when pressing button for largest cup

⟐ Answer edited May 17, 2021 at 20:34 MST

Keurig K40: K duo essential. All 5 lights in solid

Sat, 06 Jul 2024 09:24:55 -0700

All 5 lights are on solid on my K Duo Esstential and unit will not do anything. Please help

⟐ Answered July 06, 2024 at 9:24 MST

Keurig K40: hot water is pouring back into the tank

Thu, 29 Jan 2026 20:13:11 -0700

Hot water pours back into the tank what can I do to fix it

⟐ Answer edited January 29, 2026 at 20:13 MST

Keurig K40: Why wont my keurig make a full cup of coffee?

Thu, 29 Jan 2026 20:18:22 -0700

hi … i have a keurig k40 …that every couple months decides to not make a full cup of coffee … tried everything shown in info i seen on this site…last couple times i had this problem …on the top theres a check valve that i took apart ..cleaned etc and watever i actually really did im not sure ..but works than for a month or 2 same issue …would it help changing check valve ? or would this k40 have a solenoid that could be causing issue ?

⟐ Commented January 29, 2026 at 20:18 MST

Keurig K40: add water stays on

Sat, 28 Dec 2024 09:23:12 -0700

No matter what i do the add water light stays on

⟐ Commented December 28, 2024 at 9:23 MST

Keurig K40: Power light on Keurig 40 blinks

Sun, 10 Dec 2017 15:23:45 -0700

All of a sudden the power light blinks constantly. Unplugging it. Used a different outlet. Nothing works. Cannot brew.

⟐ Commented December 10, 2017 at 15:23 MST

Keurig K40: leaking water out bottom of coffee maker

Thu, 29 Jan 2026 20:22:21 -0700

my keurig k40 is leaking water from the bottom

⟐ Commented January 29, 2026 at 20:22 MST

Keurig K40: Why am I not getting a full cup of coffee?

Wed, 24 May 2017 06:51:12 -0700

I have been pressing the large coffee option, but when the coffee is done brewing my cup is less than halfway filled!

⟐ Answered May 24, 2017 at 6:51 MST

Keurig K40: Keurig “lights of death blinking.” Pump stopped working.

Mon, 12 Jan 2026 09:01:57 -0700

After doing research, I’ve come to the conclusion the pump may be shot; but just looking for confirmation. Turned it on this morning, pump went to pull water, acted slower than normal. Did the whole “put out half cup for a cup” thing. Tried one more time and the pump finally stopped. Now it won’t do anything when turned on. I left it for a minute or two, then the “Add Water, Heating, and Medium Cup” lights came on…I’ve checked the filters, check valve, needles, etc. Everything seems to flow the way it should. Saw a “method” that said to press and hold the Med cup button while everything is blinking and then the system would purge itself (or at least that’s what it sounds like it does), but all that happens when I do that is kill those lights and turn the power light back on (it’s off while the others are blinking). Is there anything else that can be done?

⟐ Commented January 12, 2026 at 9:01 MST

Keurig K40: How do I empty the internal reservoir?

Sun, 29 Mar 2020 08:08:06 -0700

I want to store my Keurig but I don't want to leave water in the reservoir. How do I get the water out of the unit for storage?

⟐ Answered March 29, 2020 at 8:08 MST

Keurig K40: Incorrect identification for part

Sat, 01 Apr 2023 00:29:01 -0700

That is not a water pump- it is a check valve!

⟐ Answered April 01, 2023 at 0:29 MST

Keurig K40: How do you remove all the water before packing away?

Thu, 06 Oct 2022 12:28:01 -0700

How to remove any water left inside machine before storing

⟐ Answered October 06, 2022 at 12:28 MST

Keurig K40: Random water output - Water left in Pod

Fri, 04 Sep 2020 10:53:41 -0700

My Keurig K40 is acting strange.

The water output varies widely!

I can press Large and get an espresso sized shot in the cup.

I can press Small and get an overflowing mug!

Press Medium and maybe get less than small.

And all this is without a Pod installed.

With a pod installed, a lot of liquid will remain in the pod…and same results as above.

I have cleaned all the needles, checked all tubing, valves and filters.

Could the computer logic be faulty?

⟐ Commented September 04, 2020 at 10:53 MST

Keurig K40: Won't heat water, said to add water. Water container is full

Sun, 24 May 2020 13:07:15 -0700

Will not heat water, said add water, water container is full

⟐ Answer edited May 24, 2020 at 13:07 MST

Keurig K40: Water coming out of top

Sat, 11 Aug 2018 15:15:18 -0700

Our system when its closed and we hit the brew button…has water that pours out of the top and when it also comes down the spout…only water comes out and not the coffee? The cups do not sit in it correctly not. WHat should I do?

⟐ Answered August 11, 2018 at 15:15 MST

Keurig K40: will not turn on

Sat, 21 Oct 2017 21:12:38 -0700

will not turn on, plug in, fill tank, add my Kcup, press power, nothing happens

⟐ Answered October 21, 2017 at 21:12 MST

Keurig K40: Water not going thru to brew

Mon, 11 Sep 2017 20:14:46 -0700

I've cleaned everything

⟐ Answered September 11, 2017 at 20:14 MST

Keurig K40: Machine not pouring the coffee after it heats up?

Wed, 01 Mar 2017 18:57:05 -0700

Why is it not pouring the coffee after it heats up?

⟐ Commented March 01, 2017 at 18:57 MST

Keurig K40: Why does it take so long to pump water to the top

Wed, 30 Nov 2016 12:35:41 -0700

Why does it take so long to pump water to the top. I descale the machine regularly. this machine has done about 2000 cups of coffee.

⟐ Answered November 30, 2016 at 12:35 MST