Heil heating and air equipment in Menlo Park, Atherton and Portola Valley is ducted: a gas furnace or air handler indoors with an air conditioner or heat pump outside, or a packaged unit that holds the whole system in one outdoor cabinet. Most of what fails on it is standard: capacitors, contactors, igniters, flame sensors, motors. Those parts are easy to identify and quick to replace. The harder question is whether the system around the equipment works: the ducts, the indoor coil and the airflow.
What Heil makes
Gas furnaces, central air conditioners, heat pumps, air handlers, indoor coils and packaged units. Most of the range is single-stage or two-stage equipment wired to a conventional thermostat. Its lines include Ion at the top, with variable-speed equipment that can run as a communicating system with its own Ion wall control, and QuietComfort.
What we see fail, and how we confirm it
| Symptom | Usual suspect | How it gets confirmed |
|---|---|---|
| Outdoor unit hums, fan does not turn | Run capacitor or fan motor | Capacitance and amp readings |
| Outdoor unit silent, indoor fan running | Contactor, low-voltage wiring, disconnect | Voltage at each point in the circuit |
| Furnace inducer runs but nothing lights | Pressure switch or igniter | Switch and resistance tests |
| Burners light, then go out | Flame sensor | Flame signal reading |
| Weak airflow at the registers | Filter, blower or ducts | Static pressure across the system |
Airflow and static pressure
Static pressure tells us how hard the blower has to push to move air through the filter, the coil and the ducts. A high reading means too much restriction: a clogged filter, a dirty coil, undersized returns or crushed ducts. Restriction shortens blower motor life, lets the indoor coil freeze in summer and trips the furnace’s limit switch in winter. On a straightforward Heil system, a high reading often explains a complaint better than any failed part, and it costs nothing in parts to find out.
Matched indoor and outdoor units
An air conditioner or heat pump is rated for efficiency as a pair with a specific indoor coil or air handler. When only the outdoor unit is replaced, the old coil may not match it in size or refrigerant, and the system can fall short of its rating or run poorly. The same goes for a new furnace under an old coil. A replacement estimate should say which pieces are changing and why, and ours does, in writing.
Warranty and records
Heil coverage depends on the line, the install date and registration. Keep the installation invoice, the registration confirmation and the model and serial numbers of the outdoor unit, the furnace or air handler and the coil, along with a note of which indoor and outdoor combination was installed, since the efficiency rating applies to that pair. We are independent and not affiliated with Heil or any other manufacturer; see our warranty page for how parts and labor coverage differ.
Repair or replace
Capacitors, contactors, igniters, flame sensors, pressure switches and motors are repairs, and on most Heil equipment they are standard parts. Replacement comes up when a compressor or heat exchanger fails on an older system, when the system still uses R-22, or when repairs keep coming back. Before replacing equipment because a room never gets comfortable, test the ducts: new equipment on leaky or undersized ducts carries the same problem forward. See duct repair, and central air installation when the ducts themselves need to be redone.
Local notes
Many Menlo Park homes are mid-century ranch houses and older bungalows with original or patched ductwork and patchy insulation, which is where a static pressure test earns its place. In Atherton, homes running two or more systems with long duct runs need each system measured on its own, since one can be fine while the other starves for air. In Portola Valley, dust and pollen settle on outdoor coils over the summer; a gentle hose rinse in spring, with the power off, helps a single-stage unit keep up on hot afternoons.