Best Rated threads in HVAC Discussionsshow all threads
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Rheem heat pump defrost cycle question
My question is about the sequence of operation during the defrost cycle. I am an electronics technician with an engineering background. The air handler is an RH1T4821STANJA, outdoor cube is an...
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8 years ago
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carrier 58sxx100 furnace has no spark or gas to the pilot on start up sequence
The gas furnace is a Carrier 58sx100-cc-1. On start up it has no spark to the pilot (3 wire). There is no gas from the gas valve going to the pilot. So it never fires up. Pressure switch closes when...
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8 years ago
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Furnace Limit sensor (Therm-o-disc type) question
My furnace has both the Fan Limit switch control where I set the pointers, and a secondary limit sensor which is the Therm-o-disc type. I recentle replaced the fan limit control because the fan ran...
5
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9 years ago
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5 | |
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Air Distribution Systems, Heating and Cooling Systems
DURU Klima consists of engineers who gained experience in the leading companies of Turkish HVAC market. The company acts as representative of the following companies in Turkey; *German KRANTZ in Air...
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11 years ago
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Sunbeam water dispenser leak
I asked this in maybe I'll have some luck here. TIA. I have a Sunbeam hot / cold water dispenser. It is the type that has a 5 gallon water bottle on top. The water leaked out yesterday. Nice mess to...
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14 years ago
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Trane heat pump with a bad sump heater
I have a Trane XL1400 3 ton heatpump. The breaker for the outdoor unit instantly trips and this is with the air conditioning thermostat set to off, so my problem lies on the line side of the...
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14 years ago
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15 | |
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Ice Storm 2003
Ice Storm 2003 NY, USA Lessons Learned April 03, Thursday, 2003 News radio people were talking about freezing rain coming. ** Lesson: When the radio people talk about weather, go immediately to buy...
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15 years ago
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Air Conditioning with Heat Pump - AC Overstock
AC Overstock sells Goodman, Ruud and Carrier online! Seems like this company finally got some products going. Any installers deal with them?They have a USA installer database they are asking me to...
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15 years ago
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neutral and ground
i have a 40 year old panel with 3 hot wires. the panel is 480 volt with no neutral and ground. what do i have to do. can i run a neutral from another box?
11
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15 years ago
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11 | |
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geothermal runs constantly
Charlie ------------------------------------- Charlie ------------------------------------- My Water Furnace heat pump runs constantly, or nearly so. I have burned out 3 control boxes in the past 3...
3
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15 years ago
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What sort of external static duct pressures typically occur in Mobile/Mfd. Homes ?
Mobile Home furnaces are different from conventional furnaces , due to the increased ESP encountered in Mobile Home duct systems . Has anyone actually checked to see what the ESP was on a Mobile Home...
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15 years ago
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20 | |
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Replace Leaking Evaporator Coil or Install new more efficient system?
Rundown: 7 year old house. We plan to live in it for 5+ years Rheem AC Unit - working fine. 10 SEER Rheem Furnace - working fine. Kind of loud. Rheem Coil(warranty is expired I think, its past 5...
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15 years ago
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11 | |
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Problems with Duomatic Olsen Ultramax HCS-90
I've been having intermittent issues with my approximately 15+ year old furnace. The thermostat is calling for heat and the fan is on, however the furnace won't light up. It works fine if you...
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16 years ago
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Johnson Controsl M15 -> M35
I'm having some trouble with the Johnson Controls Vent Damper (M15AB-2) on my furnace. Unfortunately, this model is outdated and no longer available. The currently available model is M35. Can...
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16 years ago
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gas furnace OK on a GFI circuit?
In brief, is it OK for a gas furnace to run off a GFI circuit? We have a gas furnace that's about 20 years old in the basement. (It also has a more recent central A/C unit coil on it.) The furnace...
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16 years ago
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15 | |
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What is heat pump cycle rate?
I can set my thermostat for different cycle rates. Fast Medium Slow FA ME SL 0.9°F 1.2°F 1.7°F What does this actually mean and any recommendations?
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16 years ago
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purging lines while brazing?
you know the black flakey shit that is on the outside do the pipe when it cools?? Its on the inside too!!! DUH
9
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16 years ago
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9 | |
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AIR INLET PROBLEM WITH A NEW HOT WATER HEATER WITH SEALED COMBUSTION UNIT
On my natural gas hot water heater, the flame is insufficient to produce enough heat to reach needed temperature? I've got a one year old Rheem water heater. Apparently, there is a problem...
19
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17 years ago
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19 | |
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Furnace will only run one cycle then stops
Hi All, Our furnace is a Bryant 90 High Efficiency (power vent) and it is about 18 years old. When the furnace is switched off then on (from either the power switch or thermastat) it will run one...
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17 years ago
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17 | |
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Install Dryer Vent Down through floor
What is the best way to install a dryer vent in a laundry closet that is in the middle of the house? I would like to vent it through the crawl space and out the side of the foundation wall of the...
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17 years ago
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