htp boiler install, Service & Repair – Marin & Sonoma County
Local Plumbing is your North Bay expert for HTP (Heat Transfer Products) boilers – from the newest high-efficiency combi models to older legacy units like the Phoenix and Munchkin.
Whether you need a new HTP system installed, your existing unit serviced, or an error code diagnosed, our licensed boiler specialists can help. We serve homes throughout Marin County and Sonoma County.
The HTP Boiler Lineup We Service & Install
Combi Boilers – Heat your home and your domestic hot water in one unit:
- UFT Combi (UFTC) – Stainless fire tube heat exchanger, up to 95% AFUE.
- Elite Ultra Combi – 10:1 turndown ratio, advanced control system.
Solo Boilers – For space heating only:
- UFT – Wall-hung, high-efficiency hydronic heating.
- Elite Ultra Solo – Precision modulation for consistent comfort.
Water Heater / Boiler Hybrids – Large volume heating + hot water:
- Phoenix – Stainless steel tank design for space heating & DHW.
- Everlast Light Duty – Durable tank for mixed heating/hot water needs.
Common HTP Boiler Models We Work On
- UFTC-140, UFTC-199 – UFT Combi series.
- UFT-80W, UFT-100W, UFT-150W – Solo heating.
- Elite Ultra UE-199, UE-150 – Combi & Solo.
- Phoenix PH130, PH199, PH76 – Water heater/boiler hybrids.
- Legacy Munchkin models – T50, T80, 140M, 199M.
Common HTP Boiler Error Codes & What They Mean
HTP UFT / Elite Ultra Series Error Codes
- 10 – Flame Failure – Ignition failed; may be gas supply, dirty flame sensor, or igniter fault.
- 12 – Flame Lost During Run – Burner shut down unexpectedly; possible venting, gas, or sensor issue.
- 14 – High Limit Exceeded – Boiler overheated due to scale buildup or blocked circulation.
- 15 – Water Flow Low – Insufficient system water flow; may be pump failure, airlock, or clogged strainer.
- 18 – Supply Sensor Fault – Temperature sensor failed or wiring damaged.
- 19 – Return Sensor Fault – Sensor not reading correctly; replacement may be required.
- 32 – Air Pressure Switch Error – Fan or vent blockage, improper combustion air flow.
HTP Phoenix / Older Munchkin Error Codes
- F09 – Ignition Lockout – Failed ignition sequence; often dirty flame rod or low gas pressure.
- F10 – High Limit – System overheating; check pump operation and water flow.
- F13 – Supply Sensor Error – Sensor failure or wiring issue.
- F14 – Return Sensor Error – Faulty sensor or connection.
- F15 – Vent Temp High – Exhaust temperature exceeded limit; may be blocked heat exchanger.
- F76 – Flue Temp Sensor Error – Flue gas sensor malfunction.
Why HTP Boilers Need Expert Service in Marin & Sonoma
We often see:
- Hard water scale buildup in combi heat exchangers.
- Improper venting from incorrect original installation.
- Sensor and board failures in older Phoenix and Munchkin models.
- Circulator pump issues in radiant heating setups.
HTP Boiler Installation – Marin & Sonoma
When installing an HTP system, Local Plumbing ensures:
- Correct system sizing for heating + hot water needs.
- Proper venting & gas line sizing to manufacturer specs.
- Integration with radiant floor heating, baseboard, or fan coils.
- Compliance with California codes for safety & efficiency.
