Many homeowners are turning to wood-burning furnaces like the PSG Caddy for efficient and cost-effective heating. However, some users encounter issues that prevent them from experiencing the expected comfort and performance. One common complaint is the furnace’s seemingly short heat output duration, leaving homes cold sooner than anticipated. This article delves into the potential causes of this problem and offers troubleshooting steps for those experiencing “Caddy Problems” related to heat output.
One homeowner recently upgraded to a PSG Caddy furnace, hoping for improved efficiency and longer burn times compared to their previous USStove HotBlast 1400. The new installation was connected in parallel with their propane furnace, utilizing 16-inch round ducts and dampers to prevent back feeding. A 32-foot flue with two 90-degree bends was also part of the setup. The limit switch was installed according to the manufacturer’s instructions and adjusted to turn on at 160°F and off at 100°F.
Despite these efforts, the homeowner reported unsatisfactory results. Burning primarily Elm wood, readily available in eastern Nebraska, they noticed a significant drop in house temperature overnight. After loading the firebox and setting the thermostat to 65°F, the house temperature fell from 67°F to a chilly 55°F by morning. This was a stark contrast to their experience with the HotBlast, which provided consistent warmth for hours after the initial fire died down.
The core issue seems to be the rapid decline in heat output after the initial fire subsides. While a roaring fire produces ample heat through the ducts, this intense heat lasts for only about an hour. Without frequent reloading of wood to maintain this “roaring fire,” the house temperature quickly drops. This leads to the question: why does the Caddy furnace not provide the same sustained heat as the older HotBlast 1400, even with similar wood fuel?
Several factors could contribute to this “caddy problems” scenario. Let’s explore some potential causes and troubleshooting steps:
1. Wood Type and Moisture Content:
While Elm wood is being used, its characteristics compared to the fuel used with the HotBlast could be a factor. Elm is a softer hardwood, which might burn faster than denser hardwoods. Crucially, the moisture content of the wood is paramount. Even Elm, if not properly seasoned, will burn inefficiently, producing less heat and more smoke. Ensure the Elm wood is seasoned to below 20% moisture content. A wood moisture meter can help verify this. Try burning a load of well-seasoned, denser hardwood (like Oak or Maple, if available) to see if burn times improve.
2. Draft and Combustion Air:
Proper draft is essential for efficient wood burning. A 32-foot flue with two 90-degree bends should generally provide adequate draft. However, obstructions in the flue or issues with combustion air intake can hinder performance.
- Flue Inspection: Visually inspect the flue for any blockages, creosote buildup, or restrictions. Ensure the chimney cap is not impeding airflow.
- Combustion Air: Verify that the furnace is getting enough combustion air. Modern, EPA-certified stoves like the Caddy are designed for controlled combustion. Make sure the air intake vents on the furnace are not blocked and are adjusted correctly. Experiment with air intake settings, if adjustable, to see if it extends burn times, but always follow manufacturer guidelines.
3. Furnace Installation and Ductwork:
The parallel installation with the propane furnace and the 16-inch round ducts should be sufficient. However, check for potential issues:
- Dampers: Double-check that the dampers are functioning correctly and preventing back drafting when the Caddy is operating. Improper damper function can lead to heat loss and reduced efficiency.
- Ductwork Leaks: Inspect ductwork connections for air leaks. Leaks, especially in uninsulated basements, can significantly reduce the amount of heat reaching the living space. Seal any leaks with foil tape.
- Limit Switch Settings: The 160°F on and 100°F off settings for the limit switch are within a reasonable range. However, consider slightly adjusting the “off” setting upwards (e.g., to 120°F) to see if it maintains heat output for a bit longer, though this might slightly reduce overall efficiency. Always consult the Caddy furnace manual before making adjustments.
4. Heat Loss in the Home:
While the homeowner didn’t mention changes to home insulation, heat loss from the house itself can impact perceived furnace performance.
- Insulation: Assess the insulation levels in the basement and first floor, especially in older homes. Inadequate insulation will lead to faster heat loss, requiring the furnace to work harder and potentially resulting in shorter heating cycles.
- Windows and Doors: Check for drafts around windows and doors. Weatherstripping and caulking can significantly reduce heat loss.
5. Comparison to HotBlast 1400:
The HotBlast 1400, being an older, non-EPA certified furnace, likely operated differently from the Caddy. Older stoves often relied on less complete combustion, sometimes resulting in a slower, smoldering burn that could provide heat for longer periods, albeit less efficiently and with more emissions. EPA-certified stoves like the Caddy are designed for cleaner, more complete combustion, which can sometimes mean a hotter, shorter burn cycle if not managed correctly. This doesn’t necessarily mean the Caddy is inferior, but it might require a different approach to fuel loading and air control to achieve desired burn times.
Seeking Expert Advice:
If troubleshooting these areas doesn’t resolve the “caddy problems” related to short heat output, it’s advisable to consult with a qualified HVAC technician experienced with wood-burning furnaces. They can assess the installation, draft, and furnace operation to pinpoint the root cause and recommend specific solutions. Additionally, reaching out to other PSG Caddy owners in online forums or communities might provide valuable insights and shared experiences.
Understanding the nuances of wood-burning furnaces and their operation is key to maximizing efficiency and comfort. By systematically investigating potential issues, homeowners can often overcome “caddy problems” and enjoy the benefits of wood heat.
