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Thanks Samwinter,

That helps out immensely. It looks that I would possibly be stuck with trying to find a Honeywell T7067 stat? I don't have the wiring schematic on a newer Trane zone sensor...

Good evening,

I have a co worker that visited a site today. The main controller down in the church that has all the temperature adjustments,night setback and scheduling went bad today. The...

It is on natural gas. I did have to go through and clean the blower wheel. I also tried to blow.out the secondary heat exchanger and evap coil with co2. It seems that the upper back side.of.the...

the furnace is only 80,000 BT U's . It is vented with 2 inch PVC and only goes about 8 feet. I check the outlet of the flue and it is clear. I will pull of the inducer today and take a look at the...

I recently ran into a issue with a tripping vent stack switch on a Nordyne 90% 1 pipe upflow furnace. I found the blower wheel dirty along with a dirty secondary heat exchange and evap coil. I have...

Good afternoon,

I am looking for some reviews/opinions on the Goodman mini splits. I know on the past Goodman has had its problems with quality issues. I also am aware that they have improved...

I have a new Carrier RTU that has a factory mounted Telaire duct detector. I was told by the local wholesaler that guys are retrofitting Air Products Test Stations on the duct detectors. In my...

Good evening,

I have a factory mounted Telaire TSD-CJCO1 duct smoke in my RTU. I tried to get support from Telaire without any luck. I am looking for a compatible remote test station with...

The RTU has a W973J1017

I will consult with my technician later on this afternoon to confirm if it is has a W973. I will try to get some more information from him also. Thanks for the help thus far.

I have a site with an older Intellipak CV RTU. The job currently has an inopperative controller for the day/night setback and temp controls. The customer would like to know if there is a way that...

Mitsubishi uses linesets where the gas and liquid line are insulated individualy but connected together.

It sounds like there is possibly alot of guessing going on. More info fronm technical standoint would help. Outdoor ambient, indoor temp, amps, pressures, temps. All THE VITAL STUFF!

They should have protected those economiser boards but why? Sell more boards. I have prob come across a dozen boards that have had the funky green stuff on.

Good evening,

I have a question about adding oil into a hermtic compressor. What is the best process on adding oil to a hermtic compressor. One of our other techs was changing out a 15 ton...

The head pressure trip is set at 375/ The ambient the other day was 84 deg adn the head pressure was at 275-280psi. But that doesn't mean it isn't tripping. Just witnessing it is the issue.

I have dealt with these darn economizer boards for years. On the older Voyagers, the boards start to gather corrosion from the elements over time.

Sounds like one of three things. Either both dont give a crap, dont know any better, or are the business of making and selling control boards. Fix the source of the problem not only the problem.

All I have been told is that the owner has to reset the combination low/high pressure control. The high pressure setting was at 375 psi and the low at 20 psi according to the owner. He resets the...

My question is, did the tech investigate the reason why the board fried ie. water dripping on it. Or did he just replace it and leave?

I stopped by to take peek at it and the low side was @ 25psi but what alarmed me was that the high side was @ 275psi. Box appears to be maintaining temp but will trip low/high pressure control. ...

Good evening everyone.

I was asked by a friend to check out his walk in freezer. I normally dont work on refrigeration equipment. It is another animal. Anyway, I was wondering what would normal...

Make sure that all the jumpers on the LTB are tight and with clean connections. Any smoke detectors wired in that may be causing issue? I hate Trane stats. They have nice features but are not end...

I agree with most of everything that was previously said. But after the RTU reaches setpoint and satisifies, is there still a demand at the LTB for cooild ie. 24volts from y1 to common? Everyone is...

I recently came across a Aaon RTU 6ton I believe R-22. This RTU controls a testing room for a car part supplier. They are trying to control 45-55% rh in this space. Lately the humidity has been...