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Yes, the problem was fixed about a week after that post. The replaced the wiring harness and defrost board and if relative humidity is low, it will run up to 6 hours without defrosting. Ask your...

Yeah, I read the same thing in the XP19 installer's guide. I'm glad that I'm not the only one who is experiencing an anomaly. I have a tech coming out in a little while to investigate. Thanks for...

1st stage gas comes on during defrost to temper the cold air. After defrost cycle, gas turns off if the HP is going to continue running.

I have a Vision IAQ PRO and I have set it to run HP all the way down to 5 degrees with the gas locked out at 35 degrees and up. For me, it's not a question of whether the HP running (I prefer HP to...

I have an Lennox XP19-060 HP connected to a G60UHV 135k gas furnace. It's about 28 degrees outside, so the system is running continuously, but maintaining temp fine. The XP19 is defrosting every 90...

Does anybody have a position on this?

I have a 1 year old Lennox XP19 and G60V furnace. The system works great and I don't have any problems, but it has been hot and humid in KC for the past several weeks and I was wondering if it is...

I bought a large, top of the line dual fuel system last April when the business was slow and saved north of 25% which amounted to a significant $ amount. I got several bids from competent companies...

I'm wondering if any of you have seen the impact of a radon mitigation system causing depressurization in a house? For those that haven't seen this type of a system, a 6" wide hole is drilled in the...

Good news for you. It sounds like you sealed the ducts yourself, correct? What did you use to seal them and how long did it take?

The blower speed difference between 1st stage HP and 2nd stage HP is definitely noticeable. 1st stage is nice and soft and 2nd stage is much more noisy and the same difference can be heard if you...

So, based on that, is there any way to allow the tstat (IAQ in my case) to select Y2 input rather than the XP19 defaulting to second stage when temp is at or below 40*? I'd prefer for my tstat to...

What size of XP 19 do you have and what exact furnace model and size do you have? I have a 5 ton XP19 and G60V 135k gas furnace with the IAQ stat and outdoor temp probe. I am just on the other side...

I just got a call from the service manager at my local company. Apparently after speaking to Lennox about the problem, they discovered that there is a new revision to the furnace control board that...

Thanks for the update. It really sounds like we may be in the same boat. The tech that came out to my house and indicated that it was originally wired properly, but that there was a wiring issue...

Just went outside to remove snow from my HP and I noticed that only one line is insulated and when running in HP mode, the warm lineset is exposed to 25 degree air before it goes into the house and I...

Ok, so after the third visit from a senior tech and after a total of about 7 hours of work between all of the techs, it was fixed exactly how I wanted it. The senior tech indicated that he had to...

Let us know how it goes. I am still experiencing the same problem as you. The techs are here for the second time and replaced the defrost board, but problem still exists. They put a larger...

I have almost the same Lennox system with the XP19-060 (5ton) and I have the exact same problem except that it runs demand defrost and it only lasts about 5 minutes max. The system was installed a...

I have the same problem as the original poster. With my new Lennox dual fuel system, during defrost (which is sometimes 5 minutes), the air coming out of the vent is between 55 and 60 degrees the...

I have a new Lennox dual fuel system run by an IAQ that works very well, but when in HP mode, the family can't stand the freezing cold air during defrost mode that sometimes lasts 3-5 minutes. It is...

I turned the tstat to Aux for several hours this afternoon while the ice melted off. Upon inspecting the inside, I saw that some ice must have fallen in and hit the blade and bounced off the coil as...

We are in the middle of a major ice storm in the midwest. I still have electricity, for now, so my HP is still running. It is an XP19, so it has demand defrost and it has been going through about 2...

I have a dual fuel system with both inexpensive electric rates and reasonable gas rates and I have it controlled by an IAQ. The IAQ is set at 69 during the day and it sets back to 65 at night. I...

I was on aridirectory.org and was trying to understand the difference between two Lennox units. They are the XP19-060-230 AND XP19-060-230/. The configurations including furnace, coil, capacity,...

Thanks for the responses. Now I am clear on what is happening. One other question I have is do any of you know the design BTU output on 1st stage for the model listed above? I know that second...

I have the Honeywell IAQ thermostat and it is extremely easy to configure my system to do that if you have the installer's programming guide. What stat do you have? I'm in the same position that...

I have a Lennox XP-19 HP and last night, I noticed that it would cycle on for about 10-15 minutes and then off for 10-15 min, but it was running only on the 2nd stage. I know it was on 2nd stage...

Thanks for the info. Do you have a data sheet that shows how much the compressor uses in 1st stage versus 2nd stage?

The furnace is G60UHV60D-135 and as far as the coil, I'm not sure, but the ARI is 16.45 from the matchup of the coil and the 5 ton XP19.

Good information. I'm really trying to understand the difference in general power consumption or current draw between low cool and high cool. I was not able to find any documentation on this unit...

I would like to know what the current draw is for a 5-ton Lennox XP19 in cooling mode in low cool and high cool stages. Does anybody have this info?