Lost hot water after new ac/furnace was installed

[Anonymous]

we had a new AC/ gas furnace installed and now we have lost hot water twice. The first time was right after the furnace was done. We called the installer and he came first thing next morning and got it going again. Now, a week later, we have lost the hot water again.
The carbon monoxide detector is quiet and there is no odor of gas.
Anybody have any suggestions to pass on to the HVAC guy?

Thank you

[Anonymous]

Do you think a draft is made by the AC when it kicks on and it's blowing out the pilot on the hw heater? It's the only thing I can think of.

[Anonymous]

Gas heater? Maybe some issue with the gas volume

[Anonymous]

Anonymous wrote:Do you think a draft is made by the AC when it kicks on and it's blowing out the pilot on the hw heater? It's the only thing I can think of.

This. My cousin had this issue just today.

[Anonymous]

Anonymous wrote:

Anonymous wrote:Do you think a draft is made by the AC when it kicks on and it's blowing out the pilot on the hw heater? It's the only thing I can think of.

This. My cousin had this issue just today.

How did he fix it?

[Anonymous]

Anonymous wrote:Do you think a draft is made by the AC when it kicks on and it's blowing out the pilot on the hw heater? It's the only thing I can think of.

Thanks for the info. We just found out that ac guy did have to relit the pilot when this happened last week the day after he installed the new ac Now pilot just went off again after 5 days and he is on vacation. He said he did not do anything to gas water heater and told us to call plumber. This has to be related to the new ac install. We are worried any permanent damage was done during the new ac install.

[Anonymous]

You can light a pilot.

[Anonymous]

Anonymous wrote:You can light a pilot.

Right. We light the pilot. Just don't know how to keep it on without going off again after going off twice past week.

[Anonymous]

Anonymous wrote:

Anonymous wrote:You can light a pilot.

Right. We light the pilot. Just don't know how to keep it on without going off again after going off twice past week.

The pilot flame can be adjusted, but you'll have to call a plumber.

[Anonymous]

2 potential problems:

1. Do the furnace and HWH have enough combustion air? If both are drawing air from a basement or closet, and not from outside (i.e. no high efficiency) than a lack of air will cause pilot light problems.

If the furnace is in a closet, it needs to have louvered doors.

2. The installer may have cut off the gas vent. At one end of the gas line there should be a vent on the outside of your home, should look like one of these pictures.

http://www.genesyscombustion.com/GasPressureRegulators.html

Bottom line - any installation of a gas appliance is a code issue, and everywhere in this area a licensed gas fitter MUST by regulation complete an installation, so have your furnace installer out as many time as you need to fix the situation. And you can always call the gas company (Washington Gas is particularly good about this)...if you complain, they will pull licenses until it is fixed.

[Anonymous]

Anonymous wrote:2 potential problems:

1. Do the furnace and HWH have enough combustion air? If both are drawing air from a basement or closet, and not from outside (i.e. no high efficiency) than a lack of air will cause pilot light problems.

If the furnace is in a closet, it needs to have louvered doors.

2. The installer may have cut off the gas vent. At one end of the gas line there should be a vent on the outside of your home, should look like one of these pictures.

http://www.genesyscombustion.com/GasPressureRegulators.html

Bottom line - any installation of a gas appliance is a code issue, and everywhere in this area a licensed gas fitter MUST by regulation complete an installation, so have your furnace installer out as many time as you need to fix the situation. And you can always call the gas company (Washington Gas is particularly good about this)...if you complain, they will pull licenses until it is fixed.

This is very informative, thank you. Would you explain the gas vent more? It is on the gas line outside of the home? Wouldn't the AC/furnace be affected by it being turned off also? I take it the exterior gas vent is a safety precaution against interior gas build up?