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thank you. should both inlet pressure & manifold pressure be checked?

If manifold pressure is correct, does it mean that the inlet pressure is okay?

can someone help me?

Dear Friends,

I have Amana 80% efficient gas furnace. I have condensation problem in b-vent pipe. I hired a pro and he found out that the furnace was short cycling. But, he did not exactly find...

Hello Friends,

I hired a HVAC pro to look at my gas furnace for condensation problems. He told me that he need to use combustion analyser to diagnose the problem.

But, he warned me that if he...

hearthman:
You can forgive my ignorance.

Carnak:
As you advised, I have checked the system setting in tstat. It was set to 6. I have changed it to 3. Now, the fire stays on for longer(actually...

Carnak:
thank you for your replies. Right now, the stat is set to 6 cycles. I will try changing it to 3. I am positve that the vent connector from the furnace is double wall. When the furnace runs,...

Carnak:
Thanks a lot for your detailed response.
I have checked my thermostat(Honeywell programmable model:3500/3595) user manual and found nothing to be adjusted. The cycle rate is preset for gas...

thank you all for overwhelming responses from all of you.
From all your analysis, I have the following.

1. High O2 clearly shows that it is underfiring. Underfiring could result in low stack...

hi eddy,
I think that you misunderstood what I have said in my previous post. When I tested with kleenex, it was drifting in. So, it means that wind is blowing in. Right? Is this negative pressure?

davidr:
my thermostat is digital programmable honeywell thermostat.
Should I configure the digital thermostat?
An electrical supply outlet is within 2 feet range. Can it cause anything?

thank...

Thank you all for your help.
fat eddy:
It is double wall b-vent pipe and it leaks in joints in the attic. I have also checked with kleenex and the drift is inbound to to the home.

davidr:
what...

7X:
what do you mean by temp rise? Please, help me. I have programmable honeywell thermostat. I looked at the user manual and it seems that it doesn't have manual cycle rate setting.

pipedope:...

Thank you all for your help. Some of the answers that I know. Please, help me.

Freezeking2000:
We set the temp at 66. My home is 1440 sqft.

fat eddy:
You are right. He turned down the pressue...

Hi BoltonNC,
Thanks for your reply. What is load calc? My home is approx. 1500 sqft and we don't have any problems with the heating. We get sufficeint heat with this furnace. The only problem is...

Dear Friends,
I have 10 yrs old, Amana 80% efficiency gas furnace and it vents out through b-vent flue pipe. The b-vent pipe leaks in attic and basement due to condensation.

I hired a HVAC pro to...