A gas boiler, {fuelled|sustained} with {natural gas|gas} or {propane|lp|gas}, is one {kind of|type of|sort of} {appliance|home appliance|device} {used|utilized} for {central|main} heating. It {heats|heats up|warms} water which {flows|streams} through {pipes|pipelines} or a radiator, and it is {used|utilized} for {hot water|warm water} in the {home|house} {as well as|in addition to|along with} for {a central|a main} {heating system|heating unit|heater}. It is {also|likewise} {used|utilized} for {radiant|glowing} {floor|flooring} {heating systems|heating unit|heater}. {An annual|A yearly} {maintenance|upkeep} check by {a registered|a signed up} gas boiler service heating engineer is {very|extremely|really} {important|essential|crucial} for {safety|security} and {efficiency|effectiveness|performance}. They will {make sure|ensure|make certain} that the {heating system|heating unit|heater} is {installed|set up} according to {regulations|policies|guidelines}, that it is safe and it is working {efficiently|effectively} according to the {manufacturers|producers|makers}' {instructions|directions|guidelines}. If this is done {properly|correctly|appropriately|effectively} every year, gas boiler {repair work|repair} can be {avoided|prevented}.

In order for the boiler to be serviced {properly|correctly|appropriately|effectively} it {needs|requires} to be working.

Gas boiler service {varies|differs} according to the {type of|kind of} boiler, {but|however} there are some things that {should|ought to|must|need to} be {checked on|looked at|examined} in any boiler. This will be done by the engineer according to the {instructions|directions|guidelines} in the {manual|handbook} which {came with|included|featured} the boiler when it was {installed|set up}. The {main things|main points} that {should|ought to|must|need to} be {checked|inspected|examined} are:

1. {check for|look for} {leaks|leakages}
2. {check|inspect|examine} the gas pressure
3. check if it is producing {carbon monoxide|carbon monoxide gas}
4. check if it is {functioning|working|operating} {properly|correctly|appropriately|effectively}
5. {check|inspect|examine} the {overall|general|total} condition
6. {check|inspect|examine} the pump and valves
7. {check for|look for} {enough|sufficient|adequate} ventilation
8. {check|inspect|examine} the {safety|security} and {cleanliness|tidiness} of the flue

Old cast iron boilers that have an open flue will {need|require} to be {dismantled|taken apart} and {cleaned|cleaned up} which is not {needed|required} for {modern|contemporary|modern-day} boilers. They have a systems {performance|efficiency} test. {Depending on|Depending upon} the condition and {type of|kind of} boiler it can take anywhere from a half an hour to an hour and a half for {a complete|a total} gas boiler service. {Contractors|Professionals|Specialists} are {often|frequently|typically} {willing to|ready to|happy to|going to} do {servicing|maintenance}, {especially|particularly|specifically} {during|throughout} the {summer|summertime|summer season}, for {greatly|significantly|considerably} {reduced|decreased|minimized|lowered} {prices|costs|rates}, hoping that you will call them {later|later on} if you {need|require} any gas boiler {repair work|repair}.

If there is {concern|issue} that a boiler is not working {properly|correctly|appropriately|effectively}, and gas service is {required|needed}, there are some things that can be {checked|inspected|examined}:

1. {Make sure|Ensure|Make certain} there {is enough|suffices} water pressure by {looking on|searching} the pressure gauge. It {should|ought to|must|needs to} {show|reveal} 1.0-1.5 bar.
2. {Make sure|Ensure|Make certain} the {pilot light|pilot burner} is lit.
3. If the {pilot light|pilot burner} is lit {but|however} there is no {hot water|warm water}, or it is {unusually|uncommonly|abnormally} {noisy|loud}, it {may|might} be a gas valve or pump failure in which case an engineer {needs|requires} to be called.
4. If there is {hot water|warm water} {but|however} no {central|main} heating, the diverter valve {may|might} not be {functioning|working|operating}.
5. If the top of the radiator is cold it {may|might} {need|require} to be "bled". There is a bleed valve near the top that will {release|launch} air. If it is cold on the bottom there is {most likely|probably|more than likely} sludge or rust {blocking|obstructing} the radiator.

If there is no heat at all {check|inspect|examine} the gas and {make sure|ensure|make certain} it is {turned on|switched on} {as well as|in addition to|along with} the thermostats and control switches. {Make sure|Ensure|Make certain} the pump is running and {make sure|ensure|make certain} the {pilot light|pilot burner} is lit. {Many of|A lot of|A number of|Much of} these {minor|small} gas boiler {repairs|repair work} can be done at {home|house} with {the use of|using|making use of} the {manufacturers|producers|makers}' {manual|handbook}. If you can {identify|determine|recognize} {a problem|an issue}, {but|however} are {not sure|uncertain|unsure|not exactly sure} how to {fix|repair} it even with {a manual|a handbook}, call a heating engineer for {routine|regular} gas boiler service.

If there is {concern|issue} that your gas service isn't working {properly|correctly|appropriately|effectively}, then {an annual|a yearly} {maintenance|upkeep} check by {a registered|a signed up} gas boiler service heating engineer is {very|extremely|really} {important|essential|crucial} for {safety|security} and {efficiency|effectiveness|performance}.