Linear Keypad & Intercom Repair Nationwide

Linear Keypad & Intercom Repair: The San Mateo Owner’s Guide

Linear keypad and intercom repair in San Mateo typically runs $280-$520 installed, depending on whether we’re replacing a standalone keypad or a full intercom station with two-way audio and remote-release wiring. We stock Linear-compatible units on our trucks and can usually complete the swap same-day if the gate is stuck open or the entry system is completely down. Most San Mateo homeowners realize the part has failed when the keypad still lights up but won’t trigger the gate, or when visitors press the call button and nothing reaches the house.

Call (650) 293-9440

Which Linear Models This Applies To

Linear makes three main keypad and intercom lines you’ll see on San Mateo properties: the AK-11 and AK-31 standalone keypads for residential swing and slide gates, the RE-2 residential telephone entry system, and the AE-100 and AE-500 commercial-grade intercom stations found on multi-tenant buildings near downtown and along El Camino Real. The AK-series keypads use a four-wire low-voltage connection to the gate operator; the RE-2 and AE-series add a two-conductor phone line or CAT-5 run back to the residence.

To identify yours, open the keypad housing and read the white label on the back of the circuit board. The part number starts with the model prefix, followed by a revision code (like AK-11R2 or AE-500Plus). We match that exact revision because Linear changed the mounting-hole pattern between some revisions, and the AE-500Plus uses a different voltage regulator than the original AE-500. For the AK-series, we stock both OEM Linear housings and a commercial-grade aftermarket equivalent from Seco-Larm that fits the same cutout and uses the same wire colors. The RE-2 and AE-series we generally source as OEM because the phone-line interface and tenant-directory programming don’t translate cleanly to aftermarket units.

Signs Your Linear Keypad & Intercom Repair Is Failing

• Keypad beeps but gate doesn’t move. The keypad’s internal relay is closing, but the signal isn’t reaching the operator. Often the low-voltage wire has corroded at the terminal strip, or the relay contacts have burned after years of arcing in San Mateo’s coastal humidity.
• Intercom calls cut out or sound underwater. The voice board is failing, usually from moisture intrusion through the speaker grille. We’ve found this especially on west-facing installations in San Mateo where afternoon fog sits against the housing.
• Buttons require hard presses or don’t register. The membrane switch layer beneath the buttons has cracked. On AK-series units, this happens after roughly 8-12 years of UV exposure; the membrane becomes brittle and the conductive traces separate.
• Backlight works, no response to any input. The microcontroller has lost its programming or the voltage regulator has failed. A power surge from nearby lightning or PG&E grid switching is the usual cause in this area.
• Gate opens randomly without code entry. The wiring has shorted somewhere between keypad and operator, or the relay is stuck closed. This is the failure mode that prompts the most urgent calls, since the property is effectively unsecured.

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Replacement Cost & What’s Included

The range depends on three things: which Linear model you’re replacing, whether the existing wire run is intact, and whether the mounting post or gooseneck has rusted through at the base. We quote the full installed price in writing before any work starts, under Haven Standard Clause 1. That written price includes the part, labor, programming of up to 25 codes or tenant entries, and testing of the full cycle. Under Clause 4, you get a photographed record of the old unit’s wiring configuration, the new unit’s serial number, and the programmed settings before we leave. The 365-Day Done Right Promise covers the entire installation.

DIY or Call Us?

There’s nothing inherently dangerous about a low-voltage keypad replacement, but there are two ways DIY goes wrong on Linear systems. First, the wire colors aren’t consistent across Linear revisions; we’ve seen homeowners connect the common wire to the trigger terminal and burn out the new keypad’s relay within minutes. Second, the RE-2 and AE-series require programming the tenant directory or entry codes in a specific sequence; if you skip the master-code initialization, the unit won’t store anything and you’ll need a factory reset.

What you can safely check: verify the breaker feeding the gate operator hasn’t tripped, and confirm the low-voltage transformer is putting out 16-24 VAC with a multimeter. Beyond that, the cost of a miswired replacement usually exceeds what you’d pay to have it done correctly the first time. If you’re in San Mateo and the gate is stuck open or the intercom is dead, call (650) 293-9440. We’ll name what we found, name what it costs, and name what we left behind.

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