Support Hub

Read all instructions carefully before beginning. Light two other burners and turn the control knob to medium. This will ensure the burner’s flame does not extinguish when other burners are turned on. Light the burner needing calibration and turn the control knob to the lowest setting. Remove the control knob. Insert a small, flat-head screwdriver into the adjustment screw or control knob valve stem, and slowly turn the screw until the flame appearance is correct. Open the valve more (counter-clockwise) if the flames are too small or fluttered, or the flame extinguishes entirely. Close the valve more (clockwise) if the flames are too large. Replace the control knob. Test the flame by turning the control from “LO” to “HI,” checking the flame at each setting. Repeat the above steps for each burner. 

Locate the air inlet cap, found on the far right side of the oven burner as shown in Figure 1. The oven burner can be found by removing the rectangular burner cover on the floor of the oven. The mounting screw on the far left side of the oven burner can be removed to allow easier access to the air inlet cap. Loosen but do not remove the screw on the oven burner’s air inlet cap. The location of the screw is indicated by the red arrow seen in Figure 1. Rotate the air inlet to align the cap with the engraved marking matching your gas type (NG / LPG).  Tighten screw on the burner’s air inlet cap.

Figure 1-A Figure 1-B Figure 1-C Read all instructions carefully before beginning. NOTE: Your regulator may not match the images exactly, but the procedure will remain the same. Disconnect all electrical power at the main circuit breaker or fuse box. Shut off the gas supply to the unit by closing the manual shut-off valve. Unscrew the cap on the regulator using a wrench as shown in Figure 1-A. Unscrew and remove the retainer pin that is currently positioned for natural gas as shown in Figure 1-B. The position shown in Figure 1-B is the natural setting. If the retainer pin has not yet been flipped, remove the retainer pin and re-insert into the cap as shown in Figure 1-C. Replace the regulator cap and tighten using a wrench. Your regulator is now set up for LP gas. 

Gas range or cooktop No power or low power. Check that the unit is plugged in and the breaker is switched to ON. Check that the voltage is correct for your unit according to the installation manual – 110/120V, 60Hz, and 15 to 20 Amps. Turn the breaker to the OFF position and wait 5 minutes. Turn the breaker back to the ON position and attempt to use the unit again. We advise that electrical installation be performed by a qualified, licensed electrician. If installation was not performed by a licensed professional, contact one as soon as possible to verify that the power is adequate for your unit and has been safely connected.

Q: Why does it smell like paint or chemicals when I use my oven for the first time? A: This is the result of residue from the manufacturing process burning off. Open all of the windows and doors in the room for proper ventilation and allow the oven to run with nothing inside for at least 45 minutes before the first use. Q: Why does my oven flame stay on during the entire cooking cycle? A: The oven on your Cosmo range uses a manual spark ignition with no auto reignition. The flame is designed to stay lit until the oven has been turned off. As your oven goes through the bake cycle, the size of the oven flame will increase and decrease to keep an average temperature within 20-30 degrees of the set temperature.  Q: How can I tell when my oven has been preheated to the selected temperature? A: Your Cosmo gas oven does not include an alert or indicator that the oven has reached the selected temperature. We recommend using a standard oven thermometer inside the oven to indicate when the oven has reached its set temperature. The oven will take 10-20 minutes to preheat depending on the set temperature.  Q: Does my range come with a manufacturer’s warranty? A: This range includes a 1-year manufacturer’s warranty with your new purchase from an authorized retailer. To view a list of authorized retailers, please visit www.cosmoappliances.com/locations.  Q: Where can I find the warranty terms for this product? A: The warranty terms are available online at www.cosmoappliances.com/warranty. Your unit is covered for both parts and labor for 1 year from the date of purchase.  Q: All of my burners are clicking or sparking when I turn any of them on. A: The burners on this unit will spark when you attempt to ignite any of them. This is normal operation and is an intentional side effect of the cooktop’s design. Q: Why is hot air blowing out from the top of my oven door? A: Your oven is equipped with a cooling fan to better regulate the internal temperature for more precise cooking. There are two vent locations: on top of the oven door, and behind the cooktop. This is intended by design and is normal operation. Q: Why is my unit producing black soot when in use? A: The most common cause of black soot being produced when using either the oven or the cooktop is an improper propane mixture or conversion. Check the propane gas source first, then review the LP conversion instructions.  Q: Why does my oven’s fan continue to run after the oven has been turned off? A: This is normal operation. The fan will remain on during the baking cycle as well as after the oven has been shut off until it has sufficiently cooled.

Check that the unit has been installed properly: Gas Installation Troubleshooting. Cooktop burner(s) will not light My burner sparks or clicks when turning the knob to ignite. Check for a gas smell when turning the knob. I do not smell gas. There may be air inside the gas line(s) from manufacturing, storage, or shipping.  Repeat the proper lighting procedure several times. If you begin to smell gas, proceed to the next step. I smell gas: Remove the burner and burner cap to inspect the burner ports for any obstructions such as food particles, dried liquids, etc. If debris is found, clean the burner and burner cap with warm, soapy water and a non-abrasive cloth. Allow to dry completely before replacing. Add the burner and burner cap back onto the cooktop and ensure they are seated properly. They should wiggle slightly when moved left + right, but should remain in place. Attempt to light the unit manually using a long stem lighter. Check for a visible spark on the igniter electrode next to the burner. Make sure you can see the actual spark coming from the white igniter electrode. If burner(s) still does not light on its own, contact support or a qualified technician for further troubleshooting and diagnosis. My burner does not spark or click when turning the knob to ignite: None of my burners spark or click when turned on: Check that the electrical has been installed properly: Electrical Installation Troubleshooting. Check if the burner sparks only when another knob is turned. Press and hold another knob to actuate the ignition system. While holding the knob on and allowing the igniters to spark, turn the knob for the affected burner as if lighting it normally. If it lights, contact tech support. My burner does not spark even when another knob is pushed and held in. Check that the burner and burner cap are properly seated by removing them from the unit and replacing them. Check for a visible spark on the igniter electrode next to the burner.  If you see a spark on the tip of the electrode, hold the knob in longer to allow ample gas flow to make contact with the spark.  Try lighting the burner with a long stem lighter, and if it does not light, there may not be gas flowing.  If the burner(s) still does not spark properly, contact support or a qualified technician for further troubleshooting and diagnosis. My cooktop burner(s) will light but will not stay lit: Remove the affected burner(s) and cap(s) from the unit. For the models COS-965AGC, COS-965AGFC, COS-244AGC, F965, F965NF, 850SLTX-E, 950SLTX-E, 640STX-E, VA-S950M, COS-965AG, COS-965AGF: Locate the silver and bronze tip extending next to each burner. Using a dry cloth or paper towel, clean the tip to remove any residue that may be present. The residue may not be visible to the human eye. Replace the burner(s) and cap(s) to ensure they are properly seated. Light the burner and hold the knob on to heat up the thermocouple safety device. Continue holding for up to 60 seconds.  Release the knob. The flame should stay on. If the flame still extinguishes on its own, it may need to be calibrated. If the burner still does not stay lit after several attempts, contact support or a qualified technician for further troubleshooting and diagnosis. My burners are too high or too low: The burners on your Cosmo cooktop are designed for higher efficiency and may appear higher or lower than other cooktops. Give yourself time to adjust to the new cooktop by cooking on it for at least a week. If food is cooking too quickly, try a lower temperature. If food is cooking too slowly, try a higher temperature. If your food is still cooking too quickly or slowly, even after adjusting the flame height, contact support or a qualified technician for further troubleshooting and diagnosis.

I smell gas after installing my unit: Immediately quit all usage of the unit. Switch off the gas supply to the unit by turning the manual shut-off valve to the OFF position. Contact your gas supplier to schedule a technician who will perform a leak test and red tag the unit if necessary. For the models COS-965AGC, COS-965AGFC, COS-244AGC, F965, and F965NF: The technician should inspect the rear of the unit where the regulator is installed, and ensure that the pieces are assembled in this order (Parts #1-5 are included with the unit): Main inlet pipe/manifold for the unit Blue fiber gasket Gold adapter piece Blue fiber gasket Gas regulator Any additional adapters and gas lines necessary for your installation Request and save a copy of the technician’s report detailing where any leak(s) is located. Contact support or a qualified technician for further troubleshooting and diagnosis.  No gas flow: Check that the gas shut-off valve is turned to the ON position. Check that the included gas regulator and adapter piece are installed. Check that the arrow on the bottom of the gas regulator is pointing towards the unit. Push the air out of the gas lines. Push in the burner control knob and turn to ignite. Continue to hold the control knob for up to 60 seconds. Repeat until the burner lights or there is a gas smell. Low gas pressure/flow: Confirm that the home’s gas pressure is correct for your unit.  Natural Gas Requirements: Supply Pressure: 6″ to 14″ water column.  Propane Gas Requirements: Supply Pressure: 11″ to 14″ water column. Check that the included gas regulator’s internal retainer pin is in the correct position for the type of gas used (Natural gas or LP gas). See LP Conversion Instructions for reference. Check that the orifice numbers for each burner match the necessary orifice for the type of gas used (Natural gas or LP gas). If using LP gas, check that the LP tank is full and the gas pressure is appropriate for your unit according to the included installation manual. Elevation above 2,500 feet: Additional calibration is required for high elevation gas installation. Contact support for more information.

Bake and/or Broil will not light Check that the proper lighting procedure is being used. Push in the control knob and turn it to 400 F. Hold the knob down for 30-60 seconds while the flame lights.  Release the knob and the flame should remain on. My oven does not spark or click when following the lighting procedure: Check that the cooktop burners spark or click during the lighting procedure. Check that the unit has been installed properly: Electrical Installation Troubleshooting. If the oven still does not spark or click, contact support or a qualified technician for further troubleshooting and diagnosis. My oven sparks or clicks when following the lighting procedure: I do not smell gas: Check that the unit has been installed properly: Gas Installation Troubleshooting. Check that the gas shut-off valve behind the unit has been turned to the ON position. If a new installation, there may be air trapped in the gas line. Repeat the proper lighting procedure several times. If you begin to smell gas, proceed to the next step.  I smell gas: If using LP gas: Check that the unit has been properly converted to LP gas by a qualified technician using the appropriate LP conversion kit.  The bracket holding the igniter may need to be adjusted closer to the holes on the oven burner. Contact support or a qualified technician for further troubleshooting and diagnosis. Bake and/or Broil will light but will not stay lit If using LP gas: Check that the unit has been properly converted to LP gas by a qualified technician using the appropriate LP conversion kit.  Make note of the point at which the oven shuts off: My oven flame turns off immediately (within 5-10 seconds) after it stops sparking or clicking. My oven flame turns off well after the sparking or clicking stops, but before reaching the set temperature. My oven flame turns off soon after reaching the set temperature. The thermocouple safety sensor may be out of alignment and need to be adjusted. Contact support or a qualified technician for further troubleshooting and diagnosis.  If oven still does not stay lit: The oven valve may need to be calibrated to raise the minimum flame. Contact support or a qualified technician for further troubleshooting and diagnosis. Bake temperature is off by more than 40-50 degrees: I am using LP gas: Check that the unit has been properly converted to LP gas by a qualified technician using the appropriate LP conversion kit.  Check that the thermometer being used is properly calibrated. If necessary, purchase a new thermometer. Check that the thermometer is placed in the center of the oven, and that the oven has been given sufficient time to preheat, typically 10-20 minutes. Note: At high altitudes (beginning around 2500 feet above sea level), it will take significantly longer to preheat the oven due to the lower gas pressure. For meat or poultry, we recommend cooking up to 25% longer than the recipe calls for. For leavening products such as yeast, we recommend increasing the temperature by 15-20 degrees and decreasing the baking time.  US Food Safety and Inspection Service’s web page regarding high altitude cooking Wait for the oven to cool completely to prevent burns or other injuries. Next, locate the thermostat probe in the top or rear of the oven cavity, which looks similar to this. If the thermostat probe is dislodged or crooked, attempt to reconnect it to the mounting clip(s). The oven valve may need to be adjusted to reset the temperature calibration. Contact support or a qualified technician for further troubleshooting and diagnosis. Broil stays lit but struggles to reach MAX temperature: I am using LP gas: Check that the unit has been properly converted to LP gas by a qualified technician using the appropriate LP conversion kit.  Allow enough time for the broiler to preheat. The broiler can take up to 30-35 minutes to reach 400-450 degrees Fahrenheit.  If you are experiencing undercooked or incomplete dishes, make sure the food being broiled is on the highest rack position possible. The temperature will drop significantly at each rack level and lower racks may not broil your food properly. The oven valve may need to be adjusted to reset the temperature calibration. Contact support or a qualified technician for further troubleshooting and diagnosis. Rotisserie is not functioning: Check that the rack has been fully inserted into the unit, and that the motor rod has been inserted into the slot at the rear of the oven containing the motor.  Check that the unit has been installed properly: Electrical Installation Troubleshooting. Confirm that the function has been set to the rotisserie icon using the far right knob. Contact support or a qualified technician for further troubleshooting and diagnosis.

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