Lennox thermostat to Honeywell

______________________________________________________________________ I am replacing My mercury type Lennox 51H4601 manual thermostat with a Honeywell digital RTH7500D. The letters do not match up entirely. I have O going into O/B. I have R going into R with a jumper connecting to Continue reading

Lennox Gas Furnace

______________________________________________________________________ I had a new electronic air filter installed by a reputable company. When we went to test the install, the burner started 90 seconds or so prior to the fan going on, the tech says that this is incorrect Continue reading

Bryant 394GAD blower/switch problem???

______________________________________________________________________ I own a Bryant 394GAD. When I turn on the furnace the gas turns on heats up the heat exchanger, but the blower never comes on. The limit switch reaches it limit and trips the gas off and the Continue reading

Whith Rogers Hot Surface ign. control

______________________________________________________________________ I have a W/M boiler with a whitw rogers controler # F50E47-170. I have replaced 4 allready and now I am looking for #5. They last only 2-3 years. Can anyone tell me where to get one? Is anyone Continue reading

Evaporator coils clogged?

______________________________________________________________________ I just purchased a house and did everything right…so I thought. Inspection, AC service and Home warranty all before closing. Six weeks and now the a/c does not work and I am told the evaporator coils are 75% clogged Continue reading

Heil DC90 Ignitor

______________________________________________________________________ Last heating season we started to have a problem where our Heil DC90 furnace would run but not ignite the gas burner. We have had three service calls last winter, and at end of season seemed ok. Now with Continue reading

lennox furnace

______________________________________________________________________ Sounds as if water is built up within the “intake”of the direct vent inlet from the outside,when the motor starts to vent,the fan makes a strange noise as if she’s pushing water. tim Replies: tinner73 “Re(1):lennox furnace” , posted Continue reading

convert heat pump to gas ?

______________________________________________________________________ I have a Heil 3.5 ton package unit with heat pump thats about maybe 2 years old. Can i convert it to propane heat? If so, about how much money and whats involved? Thanks Replies: Xenos “Re(1):convert heat pump Continue reading

Rheem Furnace – short cycle

______________________________________________________________________ I have a Rheem Criterion II Furnace. When I turn the Thermostat on the furnace lights up and the burners come on for about 2 minutes, and then it shuts off. After about 2-3 minutes the furnace starts up Continue reading

Trane XL 1100 wiring for automatic thermostat

05:39 ______________________________________________________________________ Hi there, I have a Trane XL 1100. I put in a automatic thermostat. When it is warm outside but I need heat, the auxillary heat turns on. How do I wire the automatic thermostat so this does Continue reading