COMMON PROBLEMS | COMMON CAUSES | POSSIBLE CORRECTIONS | |
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Rapid cycling - burner turns | Thermostat installed where drafts or | Locate thermostat on inner wall away from | |
on and off frequently. | heat affect reading. | heat sources or cool drafts. | |
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| Heat anticipator in thermostat | Adjust heat anticipator to match current | |
| adjusted incorrectly. | draw. Refer to boiler wiring diagram. | |
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| Incorrect limit setting. | Have qualified service technician increase | |
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| limit setting to decrease cycling. Normal | |
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| operation is usually less than 5 psig. | |
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Need to frequently add | Leaks in boiler or piping. | Have qualified service technician repair leaks | |
makeup water. |
| at once to avoid constant use of makeup | |
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| water. | |
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Popping or percolating noise | Mineral deposits in sections due to | Have qualified service technician | |
heard in boiler. | constant use of makeup water. or | boiler and repair leaks at once to avoid | |
| incorrect pH. | constant use of makeup water and check | |
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| pH | |
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Metal flakes found in flueway. | Contaminated combustion air supply. | Remove sources of hydrocarbons in or | |
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| near boiler area. (Bleaches, cleaners, | |
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| chemicals, sprays, fabric softeners, paint | |
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| remover, etc.) | |
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| Condensation of combustion gases. | Have qualified service technician check | |
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| boiler operation. | |
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Isolated radiation does not | Air vents or traps inoperative. | Have qualified service technician repair, | |
heat. |
| clean or replace air vents or traps. | |
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Water disappearing from | Incorrect Hartford Loop piping. | Have qualified service technician pipe boiler | |
gauge glass and back into |
| exactly as shown in Boiler Manual. | |
system through return piping. |
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Have qualified service technician clean or | |||
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| replace | |
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| Have qualified service technician clean or | ||
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| replace vacuum breaker. | |
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Violent waterline fluctuations | Dirt, oil or other impurities in water. | Have qualified service technician skim | |
- surging. |
| boiler. | |
OR |
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Waterline too high. | Have qualified service technician adjust | ||
Water passing into steam | |||
| waterline to normal height. | ||
mains - priming. |
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Incorrect piping. | Have qualified service technician pipe boiler | ||
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| exactly as shown in Boiler Manual. | |
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| Sudden release of boiler steam | Have qualified service technician adjust | |
| pressure by action of zone valves. | valve operating time or install | |
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| valves. | |
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Domestic water from tankless | Mineral deposits insulate internal | Have qualified service technician delime or | |
heater is hot then suddenly | waterways of heater. | replace coil. | |
turns cold. |
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Boiler | Have qualified service technician remove | ||
OR | |||
added to boiler water and is insulating | and clean coil AND drain and flush boiler to | ||
Domestic water from tankless | |||
outside of coil. | remove | ||
heater is always lukewarm. | |||
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Incorrect mixing valve setting for | Have qualified service technican adjust | ||
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| tankless heater. | mixing valve setting. | |
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| Domestic flow rate too high. | Have qualified service technician install flow | |
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| check valve set to rating of tankless heater. | |
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| Incorrect setting on tankless heater | Have qualified service technician raise | |
| control. | tankless control setting. Adjust differential | |
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| on tankless control to lower setting. | |
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The problems and corrections above represent common situations that can occur. There may be others not listed above. It is important always to contact a qualified service techni- cian if you have any questions about the operation of your boiler or system.
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