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Edward BairdAug 16, 2025
Why does my HearthStone Tucson 8700 glass fog up?
- SSusan FoxAug 16, 2025
Glass fogging is a normal result of gas combustion. After the HearthStone Gas Heater has warmed up, the glass should clear.
To Next PageTo Next PageWhy does my HearthStone Tucson 8700 glass fog up?
Glass fogging is a normal result of gas combustion. After the HearthStone Gas Heater has warmed up, the glass should clear.
What to do if my HearthStone Tucson 8700 Gas Heater pilot will not stay lit?
If the pilot will not stay lit, check the following: 1. Ensure there is proper inlet pressure for the gas being used. 2. Measure the voltage between the valve body and the solder connection on the rear of the valve (where the blue wire connects). It should be no less than 7 mV. 3. Ensure that the thermocouple connection at the gas valve is tight. Check the thermocouple output using a milli-volt meter. If the reading is less than 15 mV, replace the pilot assembly. 4. If burning NG, check the pilot flame to ensure it is impinging on the top of the thermocouple. Clean or replace the pilot for maximum flame impingement. 5. Clean or replace the pilot assembly if it's dirty or plugged.
How to fix delayed ignition on HearthStone Gas Heater?
Delayed ignition, which sounds like a sudden "whoosh," is often due to a buildup of gas before ignition, especially with propane. Try these solutions: * Adjust the air shutter for a proper burn to correct the air-to-fuel ratio. * Open burner ports to allow proper flame travel if they are plugged. * Reposition logs to eliminate interference with flame travel.
Why does my HearthStone Gas Heater have blue flames?
Blue flames are normal during the first 20 minutes of operation. The flames should turn more yellowish after this time. If the blue color persists, adjust the air shutter for a proper burn.
How to stop HearthStone Tucson 8700 Gas Heater burner flashback?
Burner flashback, which sounds like a blowtorch, is caused by an imbalance of gas flow. To correct this: 1. Adjust the air shutter for a proper burn to address excessive primary air. 2. Check the input rate and pressure using a manometer. Confirm correct gas pressure at the house meter or tank. Also, confirm the burner orifice size. 3. Replace the valve if there's a leak causing flashback when the burner valve is off. If these corrections don't work, replace the burner. 4. Ensure the gas pipe size is correct.
What causes my HearthStone Gas Heater pilot to not light?
If the pilot will not light, it could be due to: 1. Insufficient gas pressure, air in the pilot line, or a dirty or kinked gas line. In this case, try lighting the pilot using the piezo sparker. If it fails, check the inlet gas pressure. 2. A plugged pilot orifice. You may need to clean or replace the pilot assembly. 3. A defective or misaligned electrode at the pilot. If a match lights the pilot, check the electrode gap and location, ensuring a 1/8" gap in the flame area. 4. A defective ignitor. Check the connection between the ignitor and electrode, and inspect the wire insulation. If properly connected but there is no spark, replace the ignitor. 5. A dirty pilot assembly after sitting for the "off" season. You may need to clean or replace the pilot assembly.
What to do if HearthStone Tucson 8700 Gas Heater pilot and burner go out after warm-up?
If the pilot and burner come on but then go out after some warm-up, it could be due to: 1. Inconsistent or insufficient flame on the thermopile. You should adjust the pilot flame size and ensure it's aimed directly at the thermopile. 2. Insufficient gas pressure. Check the line pressure to confirm the correct inlet pressure for the gas being used. If using propane, check for water condensation at the regulator.
Why does my HearthStone Tucson 8700 Gas Heater have frequent pilot outage problems?
Frequent pilot outage problems can occur if the pilot flame is too low or blowing, causing the pilot safety to drop out. To resolve this, clean and/or adjust the pilot flame for maximum impingement on the thermopile and thermocouple.
Why HearthStone Gas Heater has floating flames and aldehyde odor?
Floating flames, lazy flames, and an aldehyde odor indicate potentially dangerous incomplete combustion due to an incorrect air-to-fuel ratio. This can be caused by a lack of combustion air or excessive fuel delivery. Check the appliance input rate and reduce it if necessary. The air intake/exhaust flow system may be too restrictive or blocked. Clear ports and obstructions. If gas pressures are correct and the flames stay the same, adjust the air shutter for a proper burn.
General| Fuel Type | Natural Gas or Propane |
|---|---|
| Ignition System | Electronic Ignition |
| Firebox Material | Steel |
| Efficiency | Up to 82% (NG) / Up to 82% (LP) |
| Venting | Direct Vent |
| Efficiency Percentage | Up to 82% (NG) / Up to 82% (LP) |
| Venting Type | Direct Vent |
Emphasizes the necessity of professional installation and maintenance for safe operation.
Precautions regarding flammable materials and storage near the appliance.
Safety guidelines for electrical grounding and connections.
Instructions for proper ventilation to the outside, avoiding shared flues.
Immediate actions to take if the unit is not performing properly.
Instructions against lighting pilot or main burners by hand.
Warning against operating the unit with a damaged glass panel.
Details on connecting the gas supply line to the unit.
Procedure for adjusting gas pressure, requiring a qualified technician.
Step-by-step guide for lighting the gas heater.
Common problems and solutions for pilot light not igniting or staying lit.
