Question about Hozelock Garden

Open Question

Hozelock 7902 pulsates

When I switch on my pressure wash it pulsates to normal pressure then off about every second..any idea how to fix it?

Posted by Anonymous on

3 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 242 Answers

SOURCE: pressure washer is pulsating when powered on

it just the presure building back up ,it will last years doing this,i would not worrie as replacing the presure pump will only be a temp fix and it will do it again ,most washes do this after a year or lots of use.

Posted on Dec 31, 2009

  • 97 Answers

SOURCE: K5.140 low pressure and motor pulsates when trigger released


The pulsating of the motor that you observe is occurring because the unloader valve is "cycling", over and over and over. This happens when the unloader can not trap the pressure down-line from it. Whether you have an external leak or not, your unloader is leaking internally.

On home-owner class pressure washers, the unloader valve is not a completely separate part -- as they are on commercial pressure washers. Rather, the "body" of this part is molded right into the "manifold head" of the pump. So if you are looking at the pump, the unloader is where the pressure hose hooks up (The hose is not really hooking up to the pump, but is hooking up to the outlet of the unloader valve).

What you need is an "unloader rebuild kit". To get this, if I were you, I'd find a Karcher dealer, who will look it up making any necessary cross-references etc. and come up with a part number for the kit. This kit will contain all the wearable pieces that go inside the unloader.

Also inquire with said Karcher dealer about an exploded representation of the unloader so you can see where everything goes (and how it comes apart and goes together). If such a dealer tells you he/she has no such thing -- that is likely not true. It is, however, true that these dealers may feel justified in not wanting to be "tasked" too much because they earn very little $margin$ on the sell of these parts. At any rate, you need this parts explosion and if a dealer is not willing to get you hooked up with it, go somewhere else! Also, these service sheets may be available online, but I have not been able to locate them (admittedly, my search has been cursory).

When you do this, be sure to wash out every little piece -- because we know there is damage and bits a pieces of the old wearables may be inside cavities and this could/would cause things to not work upon completion. Do this work in a well lit area and be sure your vision is as good as it can be. I generally wear reading (magnifying) glasses to be certain I can see all detail.

Good luck and if this is helpful to you I hope you'll take a sec to rate me. Thanks!

Posted on Mar 17, 2012

Testimonial: "A very full and technical solution. I have requested advice from a repair centre today and they are checking machine on Monday with a view to advising if it is financially worth repairing the unit. I will keep posted as to result."

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What does the heart on the monitor means?

The blinking heart symbol indicates that the unit is slowly decreasing the pressure in the wrist cuff. This is when the unit is finding your Diastolic blood pressure. This is a normal symbol on most automatic blood pressure monitors. When a nurse or doctor uses a manual blood pressure cuff and listens to the blood flow, they will record the systolic pressure when they first hear the heart beat. Then they record the diastolic measurement when they can no longer hear the heart beat.

The manual for the KS-7902 is available here: .

I hope this helps.

Cindy Wells

Aug 08, 2014 | Advocate Wrist Blood Pressure Monitor...

1 Answer


If you select the Normal Cycle, twice during the cycleyou will hear the wash motor going on and off at amuch different cadence. The pump will pulse severaltimes, repeatedly turning on for less than a secondand off for 10 seconds. This allows it to drive soils off the filter and into the drain while using very littlewater. If, after selecting the Normal Cycle, you select either the Sanitize or Hi-Temp Wash options your dishwasher will understand that a stronger wash is needed and it will not use this pulsing routine

Jul 25, 2013 | Frigidaire 24 in. FDB1050REC Stainless...

1 Answer

My samsung WA1065D1 toploader got a E1 please explain how and where I can fix that error?


* Generated Frequency Signal of WATER LEVEL (WIL) SIW (KHz)

Normal Level = Abnormal W/L Frequency
Low Level = 30.00 Khz
High Level = 15.00 Khz

If the same signal is detected for more than 5 seconds, it is a PRESSURE SWITCH Error. When this error occurs the drain pump will operate for 3 min. and the display will show 1 E indicating a pressure switch error.

The pressure switch should be replaced.


Dec 28, 2010 | Washing Machines

2 Answers

Pulsating when idle

The motor doesn't pulsate when you are spraying and pulsattes when not spraying is normal otherwise the pressure will just keep building and burn out the pump. However, if you are not using the sprayer right away then the unit should be shut off until your ready to start again.
I hope the answer is helpful, please rate if the answer has helped in any way. Good Luck and have a great weekend.

Apr 03, 2010 | Karcher K 3.98 M Electric Pressure Washer

1 Answer

Pressure washer is pulsating when powered on

it just the presure building back up ,it will last years doing this,i would not worrie as replacing the presure pump will only be a temp fix and it will do it again ,most washes do this after a year or lots of use.

Dec 31, 2009 | Karcher 1750 psi Electric Pressure Washer

1 Answer

Karcher 360M pressure washer pulsating problem when idleing


unfortunately these little units have this problem commonly, 9 times out of 10 it will be the plastic head or the plastic valve block on the unit will be cracked and leaking slightly... it builds up pressure then leaks out and tries to build up the pressure again and this just reoccurs over and over...

you can get this repaired but is normally about half the cost of a new unit, if the pressure is still okay i would probably recommend just keep using it until it proper dies...

If you do get this fixed, we have studied into this and believe the main cause of heads cracking is warm water say if your inlet hose is in the sun for a period of time this can cause the water to become quite hot or if the unit sits and water trapped inside the head assy freezes can also cause this. Hope this helps Kind Regards Brad

Dec 16, 2009 | Karcher PSI Electric Pressure Washer

1 Answer

Motor pulsates in rapid sucsession little pressure,with lance removed continuesto run normal,new lance same problem,my estimation is the valve at fault that controls the pressure switch

It could be the pressure switch itself at fault. If it is reading (in error) too much pressure, it will shut off for a second and then pulse as you say.

If the pump seals have gone, you may get this effect too. Depends if the pump is being controlled wrongly, or just malfunctioning itself.

Jun 18, 2008 | Washing Machines

Not finding what you are looking for?
Garden Logo

Related Topics:

42 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hozelock Garden Experts


Level 3 Expert

8019 Answers

Bill Boyd

Level 3 Expert

40701 Answers

Vernon Taylor

Level 3 Expert

2910 Answers

Are you a Hozelock Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides