Heating does most of the work in Tiburon, Belvedere and Mill Valley homes, and Bryant has been a heating name since 1904, so the Bryant equipment we service is mostly gas furnaces and heat pumps, with air conditioners in the houses that have them. Bryant belongs to the same company as Carrier and Payne. We are independent of all three: we diagnose, repair, maintain and replace Bryant systems and quote the price before the work.
Three lines, three kinds of repair
| Line | What is inside | What service looks like |
|---|---|---|
| Evolution | Variable-speed and modulating equipment run by the Evolution System control | Start with the control’s stored faults; many parts are line-specific |
| Preferred | Mid-range equipment, including multi-stage furnaces | A mix of meter testing and staging checks |
| Legacy Line | Single-stage furnaces, air conditioners and heat pumps on standard thermostats | Straightforward diagnosis; common parts widely available |
If you are not sure which line you have, the model number on the furnace’s data plate tells us.
Perfect Heat: why an Evolution furnace runs so long
Perfect Heat is Bryant’s name for the way its Evolution furnaces adjust heat output in small steps instead of switching between full fire and off. The furnace runs longer at a low setting, temperatures stay steadier and the blower is quieter. Homeowners sometimes call because the furnace “never shuts off.” On a modulating furnace, long low-fire runs are normal.
What is not normal: the furnace climbing to high fire and staying there, the house drifting below the setting, or the control showing a fault. Those point to airflow, a sensor or the gas valve, and we test before replacing anything.
Evolution control and Housewise thermostats
Evolution systems are run by a communicating wall control that stores alerts and service history. Housewise is Bryant’s Wi-Fi thermostat for equipment that does not need the full Evolution control. Two notes from service calls:
- If a Wi-Fi control drops offline after a new router or password, the equipment is usually fine; the thermostat just needs to rejoin the network.
- If the Evolution control shows a communication fault, the cause is often wiring or a loose connection at the furnace, not a failed board.
Furnace faults we find most
- Ignition and flame sensing. A cracked hot surface igniter, or a flame sensor coated with residue, gives the “lights, then quits” pattern.
- Pressure switch faults. On high-efficiency furnaces, a blocked condensate trap or a sagging vent pipe keeps the pressure switch from closing.
- High-limit trips. A clogged filter or closed registers starve the furnace of air until it shuts itself off. In large homes with several zones, dampers that stay closed can do the same.
- Blower motors and control boards on older Legacy Line and Preferred units.
Furnaces in Mill Valley crawlspaces and basements also live with damp air, so during furnace repair and maintenance visits we look for rust on the burners, the flue connections and the cabinet floor.
Repair or replace
A cracked heat exchanger, a furnace well past its expected life with repeated repairs, or an air conditioner on an outdated refrigerant are the usual points where we put replacement on the table. In Mill Valley especially, a heat pump is a common upgrade for a furnace and air conditioner pair, and it handles the mild winters well. For a like-for-like change, see furnace installation. Either way, you get written options and the price before any work starts, and financing is available with approved credit.
Bryant pages by town: Tiburon, Belvedere, Mill Valley.