Your Honeywell Thermostat
Your new Honeywell CT70A Heat Pump Thermostat provides low voltage (24 Vac) control of two-stage heating and one-stage cooling in heat pump systems, using manual changeover. Light-emitting diodes (LEDs) provide emergency heat and auxiliary heat indication.
Recycling Notice
This control contains mercury in a sealed tube. Do not place control in the trash at the end of its useful life.
If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of this control, or of an old control containing mercury in a sealed tube.
If you have questions, call Honeywell Inc. at 1-800-468-1502.
WARNING
Begin by turning off power to the heat pump at the main service panel.
Move the set point lever to the desired control point on the temperature scale.
Move the system switch and fan switch to the desired operating positions.
The system switching positions control the system operation as follows:
Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following:
Symptom | Problem | Corrective Action |
Compressor doesn’t provide warm air. | Equipment has compressor protection time delay. | Wait five minutes and check for heat. |
System switch at OFF or COOL position. | Move switch to HEAT position. | |
Blown fuse or tripped circuit breaker. | Replace fuse or reset circuit breaker. | |
Heat pump power switch is at OFF. | Switch to ON. | |
Improper connections to thermostat. | With power to furnace at OFF, tighten all mounting and terminal screws. Repair frayed or broken wires. | |
Defective thermostat. (Here’s how you know: Remove the thermostat from the wall. Disconnect wire from W1 terminal. Touch W1 wire to terminal R. The thermostat is defective if the compressor starts.) Some systems have a time delay, so allow five minutes. See step 5. | Exchange the thermostat (see Warranty). | |
Other. | Contact a qualified service technician for assistance. | |
Compressor will not stop delivering warm air. | Turn temperature setting lever all the way down. | Heater should start to cool within minutes. If not, turn off power at the main service panel, and contact qualified service technician. |
Thermostat setting and thermometer reading disagree. | Thermostat is not level. | Recheck the thermostat position on the wall. Use level to make sure it is level. See step 4. |
Thermostat affected by drafts or radiant heat. | Contact a qualified service technician to change the location. The thermostat should be about 5 ft [1.5m] above the floor and on an inside wall. | |
The compressor doesn’t provide cool air. | Equipment has compressor protection time delay. | Wait five minutes and check for cool. |
System switch is in OFF or HEAT position. | Move switch to COOL position. | |
Blown fuse or tripped circuit breaker. | Replace fuse or reset circuit breaker. | |
The compressor switch (located outdoors) is at OFF. | Move switch to ON position. | |
Improper connections to the thermostat. | With power to heat pump OFF, tighten all mounting and terminal screws. Repair broken wires. | |
Defective thermostat. (Here’s how you know: Remove the thermostat from the wall. Disconnect wire from Y1 terminal. Touch Y1 wire to terminal R. The thermostat is defective if the compressor starts. Some systems have a time delay, so allow at least five minutes.) See NOTE in step 5. | Exchange the thermostat. See Warranty. | |
Other. | Contact service technician for assistance. |
Honeywell warrants this product to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option) within a reasonable period of time.
If the product is defective,
Honeywell Inc, RG Department in Canada: Honeywell Limited/Honeywell Limitée 1050 Berkshire Lane 740 Ellesmere Road Plymouth, MN 55441-4437 Scarborough, Ontario M1P 2V9
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage that occurred while the product was in the possession of a consumer. Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion of incidental or consequential damages, so this limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE-YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may have other rights which vary from state to state. If you have any questions concerning this warranty, please write our Customer Assistance Center, Honeywell Inc., P.O. Box 524, Minneapolis, MN 55440-0524 or call 1-800-468-1502, Monday-Friday, 7:00 a.m.-5:30 p.m. Central time. In Canada write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 740 Ellesmere Road, Scarborough, Ontario M1P 2V9.
Download Manual
Honeywell CT70A Heat Pump Thermostat User Manual
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