York equipment in Menlo Park, Atherton and Portola Valley is almost always a ducted split system: a gas furnace or air handler with an indoor coil, connected by refrigerant lines to an air conditioner or heat pump outside. When it stops working, the fault is usually one part, and much of the job is making sure the replacement is the right one for that exact unit.
What York makes for homes
York sells gas furnaces, central air conditioners, heat pumps, air handlers and indoor coils. Its upper residential series is Affinity and its mid-range series is LX, and some upper systems run on York’s Hx3 communicating controls. York is also a big name in commercial equipment, which is why the logo turns up on rooftop units over shops and offices. This page is about home systems.
Start with the data plate
Every York unit has a data plate with its model and serial number: the furnace or air handler inside, the outdoor unit and often the coil. The model number tells us the capacity, the type of equipment and its parts list. The serial number usually shows when it was built. Photograph each plate and keep the pictures with your papers. If you send them when you call, the technician can check parts before arriving.
Standard parts and York parts
| Part | Usually | What matters |
|---|---|---|
| Capacitor, contactor | Standard | Matching ratings: microfarads, voltage, amps |
| Igniter, flame sensor | Often standard | Correct type and fit for the burner |
| Control board, inducer assembly | York-specific | Matched to the model and set up per its instructions |
| Variable-speed blower motor | York-specific | Programmed for that furnace or air handler |
| Indoor coil | Matched to the outdoor unit | Rated to work with that outdoor unit and refrigerant |
A universal part with the right ratings is a sound repair for simple electrical parts. For boards and programmed motors, a wrong part can run the system badly or not at all, so we match them to the model number. On Hx3 systems, a new board or control also has to be recognized by the rest of the system.
What we see fail
- Furnaces: pressure switches and inducer motors, igniters, flame sensors, and limit trips caused by a clogged filter.
- Outdoor units: weak capacitors, worn contactors and fan motors, and refrigerant leaks in the coil or at joints.
- Attic equipment: a blocked condensate drain fills the secondary pan and trips the float switch. Without a switch, the water can reach the ceiling below.
- Ducts and filters: a filter slot that leaks around the edges lets dust coat the coil and the blower wheel.
Warranty claims: what they need
A covered part is claimed through the parts supply chain, and the claim needs the model and serial number, the installation date and often the failed part itself. Registration after installation records that date; the warranty document explains the deadline and what applies without it. Keep:
- the installation invoice and the registration confirmation;
- photos of every data plate;
- records of maintenance and repairs, with the parts replaced.
Parts coverage usually does not pay for labor or refrigerant. Our warranty page explains how parts and labor coverage differ. We are independent and not affiliated with York.
Repair or replace
If the failed part is available and the rest of the system is sound, repair it. Replacement makes more sense when a furnace heat exchanger cracks, when the compressor fails on an older unit, or when the outdoor unit and the coil no longer match after earlier repairs. Outdoor units made today generally use newer refrigerants than coils from ten or fifteen years ago, so replacing only the outdoor half of an older system is often not possible. Estimates for furnace installation and replacement systems are free.
Local notes
Larger Atherton homes often run two or more York systems, with furnaces in the attic or basement, outdoor units in a side yard and long duct runs between them. Long refrigerant and wiring runs mean more joints and connections to inspect when cooling fades. In older Menlo Park homes, an attic furnace with its coil on top is common, which makes the drain pan and float switch worth a look every spring. See our Atherton page for more.