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Boiler Installation By John Owens Services
Boiler installation John Owens Services
Boilers & radiant heating

Hydronic & Radiant Heating Repair, Gas Boilers in Kentfield, CA

Radiant floor heating system repair, leak diagnosis and boiler service for Kentfield homes, served from our San Rafael office.

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Local ExpertsSince 1986
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Radiant heating system repair in Kentfield covers more than the boiler. Warm floors depend on tubing, manifolds, pumps, mixing valves and controls working together, and a fault in any one of them can leave rooms cold while the boiler runs normally. We repair radiant systems alongside gas boilers, radiators and baseboard heating, so one visit can cover the whole loop, including hydronic heating repair in Kentfield.

Not every cold zone needs a new boiler or a new floor. Radiant heating manifold repair is a good example. The manifold splits the heated water into separate floor loops, and a stuck actuator, trapped air or a leaking fitting can shut a zone down. When we suspect a leak in the system, we trace it before anyone talks about opening a floor. Finding the leak comes first; repair options follow.

We also handle the heat source. We repair condensing boilers from Navien, NTI, Lochinvar and Rinnai, and we plan replacements with your radiant loops in mind. Kentfield is served from our San Rafael office, and replacement estimates are free.

Why Kentfield radiant floor owners call us

A cold floor is not always a boiler problem. We check the whole loop, from the heat source to the tubing.

  • We diagnose radiant floors, manifolds, pumps, mixing valves and zone controls, not just the boiler.
  • We look for the cause of a cold loop before recommending a new boiler or floor work.
  • We service Navien, NTI, Lochinvar, Rinnai, Triangle Tube, HTP, U.S. Boiler, Crown, Peerless and Laars boilers.
  • Kentfield is served from our San Rafael office at 710 C St, Suite 211.
  • Replacement estimates are free, with financing and senior and veteran discounts available.

Signs of a radiant floor or boiler problem

  • A floor loop that was warm last winter is cool, or warm only in part.
  • One zone does not respond when the thermostat calls for heat.
  • The system keeps losing pressure, and you may have a leak you cannot see.
  • A pump hums, ticks or runs constantly without moving heat.
  • The boiler shows an ignition or flame fault and shuts down.
  • The boiler cycles on and off quickly without warming the floors.

Frequently Asked Questions

How does radiant heat leak detection work?

Leaks usually show up as steady pressure loss or a system that needs frequent refilling. We check the visible piping, the manifold and the expansion tank, then isolate loops to see which one is losing water. We explain what we find and your repair options before any floor is opened.

What does radiant heating manifold repair involve?

The manifold feeds each floor loop. Repairs may include replacing a stuck actuator or valve, bleeding trapped air, fixing a leaking fitting or correcting the controls. We find which part has failed, explain the repair and tell you whether the rest of the system is sound.

Can you repair a condensing boiler like a Lochinvar or Navien?

Yes. We service Lochinvar, Navien, NTI, Rinnai, Triangle Tube and HTP condensing boilers, among others. Bring the model, serial number and any error code. Repair options depend on the unit’s condition and parts availability, and we say so plainly if a replacement is the better path.

Will a new boiler work with my radiant floors?

Usually the boiler and the floor loops can be matched, but we check first: the water temperature your floors need, the pumps, the mixing valve and the controls. Replacing the boiler does not automatically mean replacing the tubing. We confirm this before giving you a free estimate.

Why is one floor loop cold while the others are warm?

A single cold loop often points to trapped air, a stuck actuator or valve, or a blockage in that loop. If the boiler is running, the problem often sits downstream of it. We bleed and test the loop, check the manifold and controls, and report what we find.

Gas boilers & radiant heat

Boiler Manufacturers

Repair, maintenance, and replacement options for the boiler in your home.

Not sure which model you have?Have the brand, model, and serial number ready when you book. Options depend on condition and parts availability.

Proudly Serving Marin & Sonoma

From the Marin coast to Sonoma wine country, we bring honest plumbing, heating & cooling to homeowners across both counties — based locally since 1986.

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Serving Marin & Sonoma Counties

Good plumbing, heating, and air conditioning systems are vital in every North California home. John Owens Services, Inc. is proud to be the expert plumbing company you can count on