Kasa Smart Doorbell KD110: problems, parts and running costs

Checked: 2026-10-05

Summary

Most KD110 trouble shows up during setup, not after: TP-Link documents no power, a red flashing light or a doorbell that never broadcasts its Wi-Fi network as the usual symptoms, traced to an undersized transformer, thin or high-resistance wire, a missing chime bypass jumper or a load device on the line. Once running, Consumer Reports rates the night video below par and data privacy sub-standard, and finds no two-factor authentication. At or below $50 it is competitive in the hardwired, chime-included bracket; above about $60 the case weakens.

Common problems and fixes

Setup failure: no power, red flashing or no setup Wi-Fi — TP-Link lists these as the most common symptoms and traces them to an undersized transformer, exposed wire ends touching behind the doorbell, a missing chime bypass jumper, wire thinner than 25 AWG or 10 ohms or more of run resistance, or a load device between transformer and doorbell; fix the wiring rather than the unit. [4][3]
Transformer out of spec — the doorbell needs existing wiring at 16-24 VAC with a minimum 10 VA, and TP-Link warns an undersized transformer can cause problems for the doorbell or damage it; no transformer is included. [1][3][4]
Old chime left in circuit — the existing mechanical chime must be shorted out with the supplied jumpers, which install on its transformer and front and rear terminals; the chime can be removed but its wires and screws must be kept. [3][4]
Below-par night video — Consumer Reports rates nighttime video “below par: not very viewable, and not as bright or clear as the better models”; the product page rates the 850 nm IR at 15 ft, so plan on a lit porch for anything further. [6][1]
Weak privacy, no two-factor authentication — Consumer Reports rates data privacy sub-standard and its feature table shows no two-factor authentication and no automatic firmware updates, though data security is rated very good. [6]
Proprietary chime with a limited range — the chime pairs only with a KD110 doorbell, within a maximum of 30 m, and one chime serves one doorbell. [3]
Vertical-only image — there is no setting to rotate the image 90 degrees, so mounting orientation is fixed. [3]
No PC or desktop viewing — the Kasa app or a supported smart display is required; TP-Link states there is no desktop viewing. [3]

Parts and consumables

microSD card — up to 256 GB on later hardware revisions and 128 GB on version 1, card not included; no price was in the inputs. [1][6]
15-degree mounting wedge — included in the box for angled mounting. [1]
Chime bypass jumpers, extension wires and wire nuts — two of each are supplied with the kit. [1]
No user-replaceable battery — the doorbell is wired only, with no battery and no backup. [1]

Yearly running cost

Not enough data for a yearly dollar figure. There is no mandatory subscription: local microSD recording is supported, and Kasa Care cloud storage is optional. The main ownership cost risk is electrical work if the transformer, wire or chime wiring is out of spec, and no price for that work was in the inputs. [1][3][4]

When it is a good buy

At or below $50 the KD110 is competitive in the hardwired, chime-included, sub-$60 bracket; Consumer Reports showed it at $49.99 on 2026-10-04, with an earlier capture of the same page showing $44.99. [6]
Above roughly $60 the case weakens, because the two weakest measured attributes — night video and data privacy — are exactly what buyers pay up for. [6]
Three named alternatives from the same Consumer Reports set: the Eufy Video Doorbell C30 at $59.99, the Ring Battery Doorbell Plus 2nd Gen from $89.99 and the Ring Battery Doorbell Pro 2nd Gen from $149.99; buyers who want a battery model or a different night-video tradeoff should compare against these. [6]
The hard gate is installation, not price: without existing 16-24 VAC wiring, a transformer of at least 10 VA, wire of 25 AWG or heavier, and a standalone momentary push button rather than an intercom or gate control, price the electrical work before buying. [3][4]