HP Product RK2-2727 has been replaced by RK2-2728.   Neither seem to be frequent sellers and the distributors often have no stock - although there may be "refurbs".


People tell us that the fans are used elsewhere. We cannot guarantee that the HP/ Canon parts are identical or that they will necessarily work in other manufacturers equipment.


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HP LaserJet (etc) P2035 RK2-2727 and RK2-2728.

The HP LaserJet P2035 and P2055 have a single small fan for cooling located in the right hand side. It cools the area between the fuser and cartridge. As with most mechanical assemblies there is a possibility of the fan wearing out and becomming noisy or jamming. The fan was RK2-2727 but that part number has been replaced by RK2-2728.

HP_RK2-2727 location

The P2035 and P2055 use the same fan, as do the Canon LBP6300DN and LBP6650DN.

The fan is a small device blowing air inwards. This presumably runs the risk of blowing dust into the printer but probably makes cooling of the fuser-cartridge gap more even. It may make operation a little quieter as well. The fan has a nominal power supply of 24 Volts and generates a clock pulse. The type seems to have varied over time. HP illustrations shows an 11 blade unit but others show a 7 blade device. The fan itself may not carry an HP part number. Research in 2013 suggests a Sunon "KDE2406PHV1-A". It is usually marked with an HP/Canon number but it is not prominent.

SUNON KDE2406PHV1 is a 24 volt "MAGlev" fan and the picture in the catalog shows it with 7 blades. Dimensions are 60x60x15mm and other details are:

Looking at other websites this fan is variously listed for the LaserJet P2035, P2055 also LJ-Pro M401, M435, M750, M552 and the CLJ CP5225, CP5525

Internal evidence is:

For RK2-2727 Recoll listed the P2035 and P2055 and Canon LBP-6300 and 6650 probably MF5840 and MF5880 as well. The P2035 / P2055 are based on the Canon LBP-6300 engine - so that makes sense

Recoll evidence for RK2-2728 is Color LaserJet CP5225, M435 and M553.

VoltageAmpsWattsRPMAir Flow (CFM)Pressure (Inch H2o)Noise (dBA)Weight (g)
240.0771.94300210.183644

A bit of further research in January 2016 Showed a Nidec D06R-24SS4 05B RK2-2728 24VDC 11 blade three wire fan as common. The fans may be technically equivalent - or it may just be that HP/Canon got a better price from one manufacturer or the other. (We can only speculate).

As with most printers the fan is likely to be active immediately on startup, during printing and for a period after printing.

So far as we know RK2-2727 is not notorious for failing and it's replacement by RK2-2728 seems to have preceeded Sunon's "Product End Of Life Notification in November 2013. It may have been purely for HP/Canon internal logistical reasons. They use the same fan on the later CP5525, and M750 printers.

Exchanging the fan needs little more than removing the right hand side, unplugging the fan from the circuit board nearby and releasing a metal clip that holds the fan in place. There are instructions in the service manual.

Initial signs of a problem are likely to be a noisy fan. Fuser overheating might be a sign of fan failure.

The fan is controlled from the DC controller part of the engine controller board under the paper path. It seems unlikely that the fan circuit would fail and if such a thing was to happen thin test probes in the fan socket would presumably show a voltage nothing like the 24 volts required.


Icecat had no further information when we looked and incorrectly identifies RK2-2728-000CN in category "power adapters & inverters". There was no record for the older code RK2-2727-000CN.

Some explanation of product codes may help. HP codes beginning "RK", "RL" and "RM" are likely to be related to a print engine originating with Canon (The same engine is used in an LBP6300). The characters "-000CN" indicate that this is the first and only variant of the part - "010CN" would be the second version of the part and "020CN" the third. The letters "CN" seem to indicate a Canon part.

HP Information

HP Partsurfer says that RK2-2727-000CN has been replaced by RK2-2728-000CN. For that code it gives:

RK2-2728-000CN Fuser fan (FM2) - Provides air to the fuser area
HP Color LaserJet CP5525dn Printer
HP Color LaserJet CP5525n Printer
HP Color LaserJet CP5525xh Printer
HP Color LaserJet Ent M750dn Printer
HP Color LaserJet Ent M750n Printer
HP Color LaserJet Ent M750xh Printer
HP Color LaserJet Professional CP5225 Printer
HP Color LaserJet Professional CP5225dn Printer
HP Color LaserJet Professional CP5225n Printer
HP LaserJet Pro 400 M401DNE Prntr
HP LaserJet Pro MFP M435nw Printer


The last five digits of the product code indicate variants. They may reflect service support bulletins, but if they do have some importance many distributors ignore tham and many "refurbishers" actually get them wrong.

As well as the HP P2035 and P2055 the fan should fit the Canon LBP6300DN, LBP6650DN and LBP6680X which are based on the same engine. The Partsurfer listing of the CP5525 is confirmed from the service manual. The M401 manual says the fan is RK2-4418-000CN - they may be the same.


RK2-2727x

Web Research

A Google Query on RK2-2727 (in quotes") suggested "About 4,290 results"

brokenprinter.com $34.95 free shipping (picture shows 2nd hand),partshere $14.24 (probably new),impactcomputers $34.95,partsurfer.hp (no price),feedroller.com $12.66 (refurb), amazon (vendor Ersatzteil) not available,ebay.co.uk (vendor tradepriceprinters) £13.95 (refurb),ebay.co.uk (vendor astrocomputer) $10 (refurb).ebay.co.uk (wrong item),sparepartswarehouse teaser page with no price,printerworks $15,

You can actually pay more for a second hand fan than for a new one. What is less evident from the summary is that non of the top-ranked vendors in search offered anything beyond minimal information, only a couple made any connection between RK2-2727 and RK2-2728. Our research found dozens of people offering the fan for sale but no evidence of anyone fixing any kind of obscure fault by changing it.

Fitting the fan has already been mentioned. The right cover of the printer has to be removed, there are instructions here. The fan plugs into the connecting PCA nearby. It is secured by a metal clip.

Supply Situation

There are a number of manufacturers capable of making a 2.5 inch 24 Volt fan, in this case HP/Canon have chosen Sunon, although they frequently use Nidec and we wouldn't be surprised if others could be substituted.

These fans are listed in UK distribution as RK2-2728 but only by two distributors and neither had physical stock in December 2013. Either should be able to get stock from the manufacturer within 7 days. Price should be about £10 for a new fan one-off. At the time of writing no broker is offering us these parts "refurbished" and given the low price of a new device we don't think it is worthwhile seeking them out.

This part should be marked available in the catalog, if not email and ask.