Lennox makes some of the best gas furnaces in the world, but even the best can have mechanical problems occasionally. G61MPV series units are high−efficiency multi−position (upflow, downflow, horizontal right and left) gas furnaces manufactured with Lennox Duralok Plus heat exchang-ers formed of an aluminized steel primary with a stainless steel secondary condensing coil. This Lennox gas furnace troubleshooting guide will help you know what to do when your furnace won't start or won't perform as it should. G61MPV units are avail-able in heating capacities of 44,000 to 132,000 Btuh Lennox® Furnace Service Manuals The Adobe Acrobat Reader® Application is Needed to Read ".pdf" Files Click Here to Get a Free Copy of Acrobat Reader®. I have a Lennox G61MPV-60C-090-02 and it is not blowing heat. Step Two. Here are some of the light patterns you might notice when your heat will not or keep running. Dave Lennox Signature Collection series: Furnaces in this series have a 10-year warranty on covered components and a 20-year warranty on the heat … How To Reset a Lennox Furnace Step One. Hi, I have a Lennox G61MPV gas furnace unit that has been working fine for about 5 years. Looked at the Surefire panel and the led lights indicate a pressure switch problem....panel says open or closed switch or blocked vent. When it first comes on the exhaust blower starts.....then after a few minutes it shuts down....no gas ignition. Flip the circuit breaker switch labeled “Furnace” or “Heating System” into the “Off” position. URGENT - Lennox G61MPV furnace schematic. Last week we noticed an electrical burning smell in the house and now the furnace won't blow air. Your thermostat may have been accidentally turned off, or may need new batteries. With service calls from furnace repairmen costing more than $100 in most cases, doing what you can to fix the problem, or at … The majority of these issues must be taken care of by a professional, like one from Bishop Heating & Air Conditioning. The source of fuel is a 500 gallon propane tank. Here are a few other of the most routine faults for Lennox heating systems. Lennox furnace not heating-code=pressure switch I have a lennox elite series gas furnace. I turned on the thermostat, and the furnace main blower never came on. This summer we used the air conditioning and again everything seemed fine. All Lennox furnaces come with parts and heat exchanger warranty, and the model of your furnace will determine how long the warranty lasts. Step 1 Start with the basics. This will eliminate the risk of any electrical injuries. Both LED lights are extinguished. If your Lennox gas furnace won't start, doesn't provide enough heat or continuously cycles on and off, a bit of troubleshooting might just solve the problem without ever having to get a repairman involved. If the thermostat is reset (turned to off then back to on) the unit starts right up and operates fine for a day or two. Click on Your Model Number Below to View the Service Manual for Your Unit Look at the control panel on your furnace. Recently, in the middle of the night the unit won't engage when the temperature drops below the set point. I ran the heating system several weekends last spring and the furnace seemed to function ok. When I had a service tech come look at i … read more Find your electrical panel and switch off the electrical supply to your furnace. Furnace Refuses to Start. I figured it was the thermostat so I bought and installed a … Will determine how long the warranty lasts the thermostat so i bought and installed a night unit... 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