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Honeywell #L8148A1017, 120V OIL AQUASTAT RELAY 140-240F
Honeywell #L4080B1352, 100-200F SPST 8F FIX DIFF AQUASTAT BREAKS ON RISE
Honeywell #L4079B1033, Pressuretrol Controller, Manual Reset, 2 psi to 15 psiHoneywell #L4079B1033, Pressuretrol Controller, Manual Reset, 2 psi to 15 psi
Honeywell #L4006H1004, 100-240F/STRAP ON/MAN RESET; BREAKS ON TEMP RISE
Honeywell #L4006E1000, 130-270F MANUAL RESET AQUASTAT; HIGH LIMIT
Honeywell #HPSR104, Hydronic Four Zone Switching RelayHoneywell #HPSR104, Hydronic Four Zone Switching Relay
Honeywell #HPSR101, Hydronic Single Zone Switching RelayHoneywell #HPSR101, Hydronic Single Zone Switching Relay
Honeywell #HM750ACYL, HM750 Electrode Humidifier Replacement CanisterHoneywell #HM750ACYL, HM750 Electrode Humidifier Replacement Canister
Honeywell #HC26A1008, Replacement Humidifier PadHoneywell #HC26A1008, Replacement Humidifier Pad
Honeywell #HC22A1007, HE220 Humidifier PadHoneywell #HC22A1007, HE220 Humidifier Pad
Honeywell #FV180, 1/8" NPT AUTO AIR VENT W/GOLD TOP
Honeywell #FV147, 1/8" AUTO AIR VENT 240F/150PSI
Honeywell #FC100A1029, 16" X 25" Media Air FilterHoneywell #FC100A1029, 16" X 25" Media Air Filter
Honeywell #ET401A1, 120 Vac, 60 Hz Gas Ignition TransformerHoneywell #ET401A1, 120 Vac, 60 Hz Gas Ignition Transformer

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Boiler Heating Supplies Controls FAQs

Boiler controls include thermostats, transformers, control boards, low water cut-offs, safety valves, and circulator pumps that regulate and protect the heating system.

A low water cut-off shuts down the boiler's burner if the water level drops too low, protecting the boiler from operating dry and overheating.

Yes. Replacement Argo parts such as control boards, transformers, and wire kits are available for electric boiler systems.

Manufacturers typically recommend testing safety and relief valves at least once a year to confirm they release pressure properly. Always check with manufacturer safety guidelines.